Why does the windshield in the car fog up. So that the windows do not sweat in the car folk remedies? Collective farms quietly - we make additional holes

Probably, many motorists often encountered such a problem - the windows inside the cabin sweat, especially in heavy rain. Of course, on older cars, such as VAZ, this was generally a big problem. But such a process can occur even for quite a long time. fresh car! For example, they bought it a year ago, and the fogging is not removed by either the stove or the air conditioner. So what's the reason? And what to do? As usual in detail, article + video version ...

It must be said that fogging is mainly manifested either in very heavy rain (when there is a lot of moisture), or in cold period time (when the car is warm and cold outside). And it’s not always a car malfunction, but you just don’t take good care of the car.

Why do windows sweat?

Let's figure it out. There are only three main reasons for this:

• Lots of moisture
• Poor ventilation
• Malfunction of the heating (air conditioning) system

I recently had such a case - a cheerful company was sitting in the car, it's cold outside now, but it's just right there. They drank alcoholic beverages, and there were 4 of them there, the stove worked and it could not cope! And they were surprised - why do the windows fog up because the car is almost new? There are several reasons - it's cold outside, there are a lot of people, they spilled beer on the rugs (that is, moisture), and alcohol, and it quickly settles on the windows.

So if, then do not be surprised. BUT this is a lyrical digression, now it will deal with serious points.

Furnace or air conditioner?

Many people mistakenly think that the interior stove will dry the glass most effectively. They turn it on to the full, but the effect (in some cases) is zero or almost zero.

But as soon as you turn on the air conditioner, the windows are instantly cleared of fogging! Why is this happening?

Everything is very simple. The stove drives hot, but moist air, it turns out, as it were, a double effect:

First of all if it is cold outside, a greenhouse effect is created.

Secondly if the air in the cabin is humid, it does not dry out, but chases in a circle

Air conditioning, on the other hand, drives cold and dry air, in simple terms it dries the windows from moisture, which instantly affects visibility.

But there is one "BUT"! The air conditioning system can work up to -5, -7 degrees, and then it will not turn on automatically. That is, in the fall it will help you, but in the winter it won’t.

That is why on some cars there is a so-called "anti-fogging" system (it can be turned on with a separate button), and it forcibly connects the air conditioning system.

From a large mileage, as well as from malfunctions (about them a little later), a certain coating may form on the glasses. From breath, from dust, etc. glasses can grow with a thin film - with a coating, of course, it may not be so visible, but if the glasses have not been rubbed for a very long time, then it looks like fogging.

RESULT one, wipe-clean the glass at least once a year before the autumn-winter period. And you need to do this with both the front and rear windows.

A LITTLE ADVICE . The plaque “sits” quite well, not every product and not every rag-napkin can remove it.

We take paper towels and ammonia (it can be diluted with water). We apply alcohol on a cloth (on any), wipe the surface, then wipe everything dry with paper towels.

If you can't stand the smell of ammonia, then you just need to buy an optics cleaner (available at any electronics store) and apply it. Then, again, remove the plaque with paper towels.

Well, now about the fight against fogging.

Lots of moisture

It happens that it is pouring rain, you constantly sit down - get out of the car, carry water with you on shoes and clothes (and humid air). As a result, your mats turn into mini pools (literally full of water), it spills onto the interior insulation (under the mat), it also gets wet. And your standard stove or air conditioner can't handle it.

This is the standard situation. You just need to get rid of this moisture in the cabin, stop in a dry parking lot, and at least just pour the water out of the floor mats. Ideally, you need to dry the interior insulation, but this requires a warm box.

Keep an eye on the interior of the car, do not let it get wet, there will be much less fogging.

Poor ventilation

Or vice versa, too good. Mostly our OLD ones suffered. There are two options here:

• Broke, like "improved" interior . This is when, for example, they “make noise” (make additional sound insulation) of some domestic VAZ(for example, 2114, 2112, etc.) and seal at their discretion all unnecessary holes (which are applied in the body for ventilation). As a result, the car becomes like a thermos that does not breathe at all, and the excess condensate is “right there”. He simply has nowhere to go, and such craftsmen then rack their brains, what to do?
• Deterioration of seals, the body itself . It happens that from high mileage, door seals, trunk (or fifth door) wear out. Through them there is an excessive intake of cold air, or humid (sometimes even moisture can pour into the cabin). Well, it happens, the body completely rots, that is, right here through holes. And this again violates the ventilation of the body laid down by the factory.

There are two pieces of advice here - do not break and do not ineptly improve the interior (everything has already been invented for you). Well, if the seals are worn out, replace it, it's not so expensive.

Heating system malfunction

There is something interesting to say here, it won’t rattle, let’s start right away:

• Banal reason. The stove broke down, it doesn’t work, either the engine itself was “covered” or the fuse. Need to fix. Further, we will assume that everything is in order in our electrician.
• Glasses sweat a lot. A sweetish smell in the cabin and in the rugs is an incomprehensible liquid. Here, at 100%, you either have a stove radiator or some pipes - hoses. Moreover, they penetrate into the salon. Everything needs to be taken apart and looked at. It is worth remembering that in coolants there are, in fact, these are “simple” alcohols, they also evaporate quickly and your glasses will just VERY VERY SWEET, no stove and no air conditioner will help you. YES, and breathing vapors of ethylene glycol (which is included in the formulations) is unsafe - IT IS TOXIC. So you need to quickly eliminate the leak (by the way, this can still lead to overheating of the motor)

• but through every night and bold. This is not the kind of raid that I described above, here, again, antifreeze or TOSOL is still flowing somewhere. BUT not so much, you can say it oozes. Run your finger over the glass, if there is a greasy coating, then disassemble the panel, see the stove - rods - nozzles
• cabin filter . I myself recently encountered this, one might say on a new car. The bottom line is, on OPTIMA at the first MOT, they can change, or they can not change the cabin filter (by the way, this is almost for all brands). Personally, I didn’t change it, I said, leave this one - if I change something myself later (in the video version there will be instructions on how to do this). Well, and as it becomes clear, I have it clogged with all sorts of dust and other “charms”. The glasses began to sweat a little, it became especially visible at night, not much, but unpleasant! In general, we change the filter, performance is restored. And it seemed to me that the stove really began to blow harder (you can see the filter, it was completely clogged).

I already talked about the anti-fogging glass (read

With the change of seasons for autumn and winter, as well as the onset of the accompanying cold weather and an increase in air humidity, all drivers are faced with such an unpleasant problem as fogging the windows in the car. Not only does this phenomenon quite strongly affect the comfort of all passengers of the car and its driver, but the view is also greatly limited, and this can be really dangerous. For these reasons, it is necessary not only to understand why the windows in the car are fogged up. What to do in such situations is no less important knowledge.

Causes of fogging glasses

So, the question of whether it is considered one of the most topical when the temperature outside the window begins to drop. There may be several reasons for such a phenomenon, and it is very important to know them, as well as to be able to resist in every possible way and be fully armed at any moment.

It is no good to constantly wipe the window with a cloth as soon as it is fogged up. First of all, it is not very effective, and secondly, this method is very difficult while driving and entails the creation of an emergency.

Human factor

We all noticed at least once that the more people there are in the car, the more the windows in the car sweat. This process is easily explained by the simplest knowledge of physics. The fact is that a person's breath, compared to the air temperature on the street and even in the car itself, is warmer. Consequently, when several people breathe inside the cabin, a collision of warm and cold air flows occurs, and condensation appears on the coldest parts of the car, that is, on the windows, which is the settling of very small particles of water. This means that the more passengers in the cabin, the higher the percentage of humidity from breathing and the more the windows in the car sweat.

Temperature difference outside the window and in the cabin

Another very significant factor is the difference in air temperature outside and inside the car. Condensation also forms here, but the cause is no longer human breathing. In winter, the windows in the car fog up due to the fact that cold air flows from the street and hot air from the passenger compartment collide on the glass, as a result, the same phenomenon of moisture condensation occurs. Outwardly, it looks like foggy glass, blocking our view and causing a lot of trouble.

As many have already guessed, we are talking about people inside the car who drank alcohol. In this case, alcohols are present in the human breath, which, getting into open space, mix with oxygen molecules and react with them. Alcohol in such situations is an active absorbent and is able to actively absorb moisture, settling on all surfaces, including windows, so that in this case fogging can occur even in summer. So there is a simple answer to the question "if the windows in the car are fogged up, what to do" in such a situation. Just ventilate the interior.

Clogged air filters

In the case when your windows in the car are fogged up, you don’t know what to do, and what could cause this phenomenon is also unknown, clogged air filters in the cabin. With such a problem, the air inside does not circulate, and at the slightest resonance of temperatures inside and outside, moisture also settles on the windows. The way out of this situation is also quite simple, just send your iron horse to Maintenance, where the problem of filter clogging will be eliminated, and unpleasant fogging will go away by itself. True, the above reasons should not be forgotten anyway.

Solving the problem of fogging windows in the car

As with the causes of fogging windows, the solutions here can also be different. Some of them are not very effective, but now we will consider the most radical methods of struggle that will allow the driver and his car to feel great at any time of the year.

So, as mentioned above, the windows in the car fog up a lot in winter, and this happens for obvious reasons. So at this time of the year, one of the most effective methods of struggle is a serviceable stove, air conditioning and clean air filters. Thus, before each trip, try to turn on the air conditioner for a few minutes, which, as a rule, allows you to dry the air in the cabin a little, which prevents condensation. If the car is not equipped with air conditioning, just turn on the stove and open the air filters, the car will be ventilated and the air will become drier, which will give the desired effect. A more effective action would be to direct the air flows from the air conditioner or stove directly onto the glass, this will greatly speed up the process.

Chemical method of struggle

Another fairly effective and practical method for every driver. It involves the use of special washer fluids, popularly called them simply anti-fog.

If the windows in the car are fogged up, you will understand what to do as soon as you buy the appropriate product and read the instructions for use. However, it is still worth saying that anti-foggers differ in the method of action and are of three types:

• Specialized liquid, which, after careful processing of the glass, forms an invisible film that prevents any moisture from settling on the glass.
• There are also liquids and aerosols that, once applied to glass, are able to repel moisture.
• Anti-foggers in the form of an ointment or cream are the third option for chemical treatment, after which you will not think about why the windows in the car fog up. This type of struggle is the most expensive option of the three mentioned, however, one such treatment is more than enough for 2-3 trips even in heavy autumn rain, while the first two options will have to be applied again each time.

So, we have considered the most effective methods of dealing with fogging of car windows, and each car owner received a clear answer to the question of why the windows in the car fog up, which means that no bad weather is now scary for you.

Misted windows in the car significantly reduce visibility, can cause a traffic accident. Most often, drivers encounter this problem during the cold period of car operation.

Why the windows in the car sweat from the inside and what to do to reduce their "sweating" read on.

Why windows in the car fog up in terms of physical processes

Fogging of the glass in the car is a consequence of the physical process of the transition of water from a gaseous state to a liquid state (condensation). When the car is parked, the temperature of the air inside the passenger compartment and outside (the environment) are equalized, as is the relative humidity.

At the time of landing in the cabin of the driver and passengers, the humidity increases significantly due to the exhaled air, which contains a high concentration of water vapor. Many drivers know that the effect is greatly enhanced if there are alcohol vapors in the exhaled air.

Since the glass remains cold at the time of landing (its temperature is below the dew point), air vapor instantly condenses on it. Condensation also occurs on other interior elements, but it is not essential for visibility.

Video - why the windows in the car fog up and how to deal with it:

The most effective ways to deal with air condensation so that the windows in the car do not sweat:

• glass heating to a temperature exceeding the dew point;
• powerful glass blowing, leading to the reverse evaporation of water;
• drawing special means on the inner surface of the glass, reducing vapor deposition, transforming the structure of microdroplets.

Thus, in the cold season, the condensation process, which leads to fogging of the windows in the car, is inevitable. It can be increased many times under the influence of other operating conditions. vehicle:

• during the winter period of operation of the car, the dew point temperature changes, the time for the necessary warming up of the glasses increases;
• during rain, the humidity of the air increases significantly, the likelihood of moisture entering the cabin, due to the washing of glasses with raindrops, the time of their warming up also increases;
• while the car is moving immediately after the driver and passengers have landed in an unheated interior, it is more difficult to warm up the glass due to its cooling by oncoming air flows.

Causes affecting the increase in the effect of fogging windows in the car

In addition to the above effect of the presence of alcohol vapors in the passenger, the following vehicle operating conditions contribute to an increase in the fogging of the glass in the car from the inside:

• Increased humidity in the cabin. It can be caused by wet mats, seats after contact with wet clothes of the driver and passengers, water that got into the cabin with bad glass seals, plugs, loose doors, remaining drops of rainwater and snow after opening the doors, drinking drinks (especially hot ones) in salon. All this can significantly increase the relative humidity.

• Pollution, wear cabin filter. Many drivers do not change the cabin filter for years. Moisture accumulates in its cavity, especially during the summer period of car operation during frequent turning on of the air conditioner.

• Incorrect operation of the damper regulators of the interior blower system. In this case, the recirculation of air flows in the passenger compartment of the car may be impaired, the efficiency of forced air ventilation is significantly reduced. In this case, excess moisture from the passenger compartment will practically not be removed during the movement of the car.

• Furnace radiator leak. Even a slight leak of antifreeze from the stove radiator or pipes, which is not detected visually and by the human olfactory organs, can increase the relative humidity in the car interior by 10 - 20%. You can detect a possible small leak of the stove radiator by a characteristic oily coating on the inner surface of the windshield.

• Frequent car wash. If the car is not new, door and glass seals are worn out. At the time of washing, especially under high pressure, moisture enters the car, which does not have time to completely leave the cabin before the next procedure.

What to do if the windows in the car fog up from the inside

A set of measures to reduce the effect of fogging of car windows from the inside can be conditionally divided into preventive and operational.

Preventive measures should include:

• Timely replacement of the cabin filter. It is best to change the cabin filter during the change of seasons of car operation: cold - warm and warm - cold, that is, twice a year. If the machine is not operated in a busy mode, then it is enough to replace the cabin filter once a year - at the end of the warm period of operation. Simultaneously with the replacement of the filter, it is necessary to clean the internal cavity of the filter installation site, the pan and the condensate drain hole.

• Periodic cleaning of the car interior. During the operation of the car in the cold season, especially after prolonged precipitation, it is necessary to periodically dry non-rubber mats and seat covers, if any. They absorb moisture like a sponge. Drying can be done by placing them overnight on a heating radiator. To dry the interior, you can leave the car once a week in a dry, heated garage with open doors. There are special materials such as silica gel (bags of it are sometimes placed in high-quality shoes during pre-sale preparation) that absorb moisture. To absorb moisture from the interior of the car, at least 1 kg of material will be required. It is dried on a heating battery, then placed in a car interior for a day, after which it is dried again.

• Cabin ventilation regulation. Before the cold period of operation of the machine, it is necessary to check the performance of all regulators and valves responsible for the redistribution of heating and ventilation air flows, if necessary, repair them.

Video - if the glass sweats a lot in the car, what to do and what means can be used:

Operative measures to eliminate fogging of glasses in the car:

• The constant presence in the passenger compartment of the car of a soft, dry cloth for wiping the windows. In practice, you need to have at least two cloth napkins, one of which is stored at home to dry, the other in the car. At the end of the trip, they change places.

• Treatment of the inner surface of the glass with special means. The simplest remedy is a home-made aqueous soapy solution of low concentration. It changes the surface tension of the glass material. Moisture rolls into microdrops, which practically do not interfere with visibility. At negative temperatures, such a mixture is ineffective. Some car enthusiasts make up a mixture using glycerin, but it causes glare at night. In the car market you can find many special means of chemical origin. Each of them is effective in its own way, you should select them empirically.

• Coating glass with a special nanofilm. This coating is made in motorcycle helmets. Before carrying out such an expensive procedure at the service station, you should consult with specialists.

• Reduce the amount of unnecessary things in the car. They can absorb moisture, especially various blankets, bedspreads, cloth rugs.

• Talk less in the car, especially when the car is warming up.

Additional Warnings

To avoid problems, do not wipe the inner surface of the glass with an alcohol-containing liquid, as well as products of dubious origin!

Fogging windows in the car is a problem that most often occurs in the off-season. There is often high humidity on the street, with shoes, a lot of moisture is brought into the salon from umbrellas. And then, when you turn on the stove, the moisture actively evaporates and condenses on cold glasses.

cabin filter

Generally speaking, in a car that is working properly, the moisture is removed and the windows don't sweat, unless you boil the kettle inside. So, if the problem of fogging glasses is relevant for you, look for the cause.

The most common is the cabin filter. All drivers change regularly oil filter and airy, but for some reason they forget about the salon. Meanwhile, it must be changed about once every 15-20 thousand kilometers. Most often it changes from the glove box. Look at his condition. If it is dirty, then perhaps replacing it alone will solve the problem.

Door gutters

Another reason for increased moisture is clogged door drains. In the doors under the seals there are drainage holes. After years of operation, they become clogged with dirt, small debris and the water from the doors does not go anywhere. As a result, you have not only increased humidity in the cabin, but also accelerated corrosion of the bottom of the doors. Locate the drainage holes and clean them with thin, stiff wire. Sometimes, already in the process of cleaning, water pours out from there and the problem in fogged glasses goes away.

Air vents clogged with leaves and dirt can also be the cause of poor interior ventilation. In some car models, they are located between the windshield and engine compartment. There, in the fall, foliage just accumulates, and in winter, garbage and snow. There are also ventilation holes in the trunk. They are hidden behind the skin, nevertheless they work. And if you crushed or blocked them with something, excess moisture will no longer leave.

Air recirculation and air conditioning

Very often, the windows sweat due to the fact that the driver does not use the air conditioning system correctly. Check if you have the cabin air recirculation mode turned on. If enabled, disable it and enable outdoor air intake mode. In general, air conditioning helps to dry the interior and remove excess moisture. If you have it in your car, turn it on (you can turn it on safely and without fear, even with frost) at least for a while.

Last Argument

If none of the above helps, then use a special pad to remove moisture. They are sold in car dealerships and car markets, you can order them on Aliexpress. Inside the pad is a desiccant like the one you put in small paper bags inside your shoes. This filler will absorb excess moisture and become heavy and wet.

To dry it, you need to take the pillow home and put it on the battery. Or just put it in the microwave for a few minutes and turn it on. Then it can be used again.

In general, in order to avoid the accumulation of excess moisture in the cabin - and it accumulates most often on rugs or under rugs - in autumn and winter it is better to use not pile rugs, but rubber ones. And under them it’s still good to put special “car diapers” that absorb moisture. Well, or you can do it the old fashioned way - put several layers of newspaper under the rugs and periodically change it when it becomes wet. Newsprint paper absorbs moisture very well.

You can also buy special car chemicals from fogging glasses, but many advise rubbing the glass with shaving foam. They say the effect is the same.

On Wheels: How to Legally Improve Your Headlights

Every motorist, no matter what car he drives, has encountered such a seemingly insignificant problem, which is the fogging of car windows. Contrary to popular belief, the cause of this phenomenon is alcohol, not consumed by the driver or passengers of the vehicle, although this factor contributes to an increase in the intensity of fogging.

The danger of this phenomenon lies in a significant deterioration in visibility, leading to a decrease in the control of the road situation on the part of the driver of the car, that is, it directly affects the level of traffic safety. How to deal with sweating automotive glass?

To determine the optimal and effective methods To combat this phenomenon, it is necessary to understand the causes of its occurrence.

The process of formation of fogging is explained quite simply. It is based on the temperature difference inside and outside the vehicle and high humidity inside the cabin. Automobile glass, which serves as a boundary separating air masses of different temperatures, condenses excess moisture on itself.

Therefore, it is quite obvious that the only effective method of combating fogging of windshields (and not only) glass should be measures to minimize the humidity of the air in the passenger compartment.

So, why do air masses inside a car have a high level of humidity? There are several main reasons for this:

Video - Glasses in a car sweat - how to deal with it?

How to defog car windows

Currently, there is a whole range of measures that help the motorist to deal with this negative phenomenon affecting traffic safety. Moreover, this complex includes not only measures for the direct elimination of fogging, but also preventive measures that help eliminate the very possibility of the formation of wet fumes. So what to do?

• Produce regularly purge inside automotive glass with the obligatory use of high-quality detergents, and after cleaning, wipe them dry with a clean rag. In addition, try to avoid touching the glass surface with your hands.
• In a timely manner dry the interior: floor mats, noise insulation, seat upholstery, etc.
• In time replace the cabin filter and cleaning the climate control drain.
• Regularly inspect possible locations leaks salon.
• Monitor the performance of the vehicle's ventilation system.

Ways to eliminate fogging

In the event that car windows are already fogged up (or iced over), experts recommend:

• Warm up the car until the windows fog up, while excluding the presence of people in the cabin.
• Turn on the ventilation system in a mode that ensures the flow of air masses from the outside, since the air circulation in the cabin is ineffective.
• If the vehicle is equipped with an air conditioning system, turn it on.

Chemical anti-fogging glass protection

Modern manufacturers offer motorists a wide selection of chemicals (liquid and aerosol) that prevent windows from fogging. The principle of operation of these preparations is based on the formation of a water-repellent film by them, which reduces the coefficient of surface tension of glass, which prevents the formation and preservation of excess moisture on the surface of automotive glass.

The action of almost all modern anti-fogging glass protection products can be divided into two stages. Initially, the drug acts as a glass cleaner, since it contains cleaning components, and then the cleaned car glass is covered with a specific protective film.

However, in the process of choosing and using chemicals that prevent fogging of car windows, there are certain features, the so-called "pitfalls". Low-quality preparations, of which, unfortunately, there are quite a few on the shelves of domestic car dealerships, have the negative feature of leaving a non-drying greasy film on the surface of auto glass. Traces from it stain the interior upholstery, and the stains and glare that appear on it can significantly complicate the perception of the traffic situation by the driver of the vehicle.

The use of high-quality drugs does not threaten the motorist with such complications, however, their search will require some effort, and the acquisition of some costs.

As a summary, it must be stated that if you sweat windshield from within is serious problem and it must be solved by no less serious methods and by means of serious means. It was about them that was described above.