What to do if there is fog in the windshield of your car

As follows:

1. Use defogging agent to remove fogging, only need to spray it evenly on the glass surface when using, and then wipe it clean with a dry towel;

2. Turn on the windshield wipers, just set the wipers to low and let them run until the fog disappears;

3. Replace the air source, most cars are equipped with buttons, which can circulate the air in the car, or inhale the air from the outside;

4. Reduce the temperature in the car, because the fog is caused by different air temperatures, so match the temperature inside the car with the air temperature outside the car to reduce the fog, adjust the car fan to the highest setting, and lower the temperature as much as possible.

Introduce. In winter, the temperature of the car windshield is very low, and the water vapor exhaled by the person in the car compartment will liquefy into small water droplets when it meets the low temperature windshield, so a layer of water mist will appear. If there is no one in the trunk, there will be very little water vapor in the trunk, and even if the temperature of the windshield is very low, there will be only a small amount of water mist on the glass.

1. First of all, after finding that the water temperature is too high and stopping to the side, it should not be turned off immediately, because there are many reasons for the high water temperature, but there is probably only one fault each time, if all other functions are turned off, the water temperature will be too high, damaging the engine, the accurate approach should be to idle the park, open the hood, turn on the heater, dissipate heat as soon as possible, and pay attention to parking in a cool place.

2. Next, we have to check whether the coolant is sufficient, this situation is likely to be that the owner usually does not care about forgetting to add it in time, and it should be noted that the owner must choose the same brand and model of product when adding coolant, otherwise it may cause chemical reaction due to different components and lead to the failure of antifreeze.

3. Then, we are looking at whether the cooling fan is running normally, and the failure of the cooling fan will cause the heat generated in the car engine at high speeds to be transferred to the antifreeze and not be dissipated in time, resulting in an increase in the temperature of the antifreeze. If the fan is stuck or the insurance is burned, you can solve it as soon as possible after the power failure, if it is a line problem, it can only be handed over to the professionals of the 4S shop to overhaul.

Extended Information: Car Radiator Function.

The function of the cooling system is to dissipate excess and useless heat from the engine, so that the engine can operate at normal temperature at all speeds or driving conditions.

The water tank is the heat exchanger of a water-cooled engine, which is cooled by air convection to maintain the normal operating temperature of the engine. Once the cooling water of the engine in the water tank boils and vaporizes and expands due to high temperature, and the pressure exceeds the set value, the pressure will be released from the water tank cover (a), resulting in a decrease in cooling water and preventing the cooling system pipeline from bursting.

When driving, you should pay attention to whether the engine cooling water temperature gauge pointer on the dashboard is normal. In addition, if the engine cooling fan fails and the water temperature of the engine cooling finger bend rises or the cooling system pipeline leaks, the cooling water may also be reduced.

Due to the temperature difference between the inside and outside of the car, the temperature inside the cab is higher than the outside, causing moisture in the cab to condense on the inner windshield to form fog. This phenomenon is more common in winter.

Solution: 1. Turn on the air conditioner, turn on the air conditioner for a while, and then turn on the heating after the fog disperses. Then adjust the air conditioner to blow towards the windshield so that the hot air from the blow can evaporate the fog.

2. Wiping the inside of the windshield with a rag dipped in dish soap or a special anti-fogging agent can also effectively prevent the glass from fogging.

3. Use a rag to wipe off the fog, this method treats the symptoms but not the root cause, and when it is wiped off, the water vapor will condense into fog immediately.

4. Open a little window, but this method is not good for rainy days, which will cause rain in the cab.

Causes of fogging in the front windshield:

1. It is caused by the temperature difference between the inside and outside of the car, and the temperature in the cab is lower than that outside, causing the water vapor outside the cab to condense outside the windshield to form water mist;

2. The water molecules in the air are constantly moving irregularly. When there is no temperature difference, water molecules keep hitting the glass and flying out of the glass. Because the lower the temperature, the slower the rate of motion, so after the water molecules hit the cold glass from the hot air, the movement slows down and cannot fly out in time, while the water molecules outside are still hitting the glass, so the water on the glass is more and more, and finally gathers into small water droplets;

3. Saturation pressure can be understood as the amount of a certain gas (such as water vapor, alcohol vapor, etc.) that can exist in the air at a certain temperature, and when the actual amount of a gas in the air is greater than this amount, it will be liquefied;

4. The glass and water are infiltrated, so the water is aerosolized back on the glass, but the mercury will not fog up. Therefore, the principle of some glass defoggers is to cover the surface of the glass with a film that does not infiltrate with water.

Fog and dew are formed when gaseous water turns into liquid water when the temperature drops, and when the temperature rises, it turns into gaseous water. Speaking of which, everyone should understand that there are two reasons that affect fogging on the windshield of a car.

One is temperature, and the other is humidity. If you understand the principle, you can prescribe the right medicine. So how do you remove fog from your windshield the quickest and most effective?

The most direct, fast and effective method is: cold air defogging. Twist the wind direction to the windshield blowing position, and turn the wind switch to the 1st or 2nd gear, and blow for 15 seconds.

The cause of windshield fogging is caused by a large temperature difference between indoor and outdoor in winter. If the driving environment is more complicated during driving, you can use the cold air to carry out, which has the advantage of quickly removing the fog on the windshield and avoiding the inability to see the road due to fogging. However, because the indoor temperature needs to be high in winter, after removing the fog, the temperature should be adjusted to the warm air position several times to prevent the fog from reappearing.

If you are in the parking phase or just hot car stage, you can directly use the way of blowing warm air, although the fog removal time is relatively slow, but the warm air should be turned on all the time, if necessary, turn on the front windshield defrost function. This prevents the fog from re-generating and meets the temperature needs of the indoor driver.

Under normal circumstances, when the temperature inside the car is high and the temperature outside the car is low, because the moisture in the car meets the cold glass, it will condense into small water droplets and stick to it, so that fog is formed.

The temperature difference between indoor and outdoor is large, especially in winter, after turning on the heating, the window will fog up after a while, at this time you can turn off the heating or remove the fog so that the air conditioning outlet will be aimed at the window to defog, or you can turn off the heating car glass to drop a little, so that the outside natural wind blows in is also okay, hope to adopt.

The fog is because there is a large temperature difference between the inside and outside, we can turn on one of our warm air, or cold air, but we must turn on our AC switch, which can effectively decontaminate.

1. In the case of small fog, you can properly open the windows on both sides to let the air convection, so as to eliminate the temperature difference on both sides of the windshield, and the fog is naturally difficult to form.

2. Turn on the cold air of the air conditioner, which can eliminate the fog in a very short time. Blowing hot air can fundamentally solve the problem of glass fogging. The fog doesn't come back after the hot air turns off, and it doesn't make the people in the car even worse in the cold winter.

However, the biggest problem with blowing hot air is that it is slow to produce results, and it takes a long time to see the effect.

The solutions to fogging in the windshield of a car are:

1. Air conditioning defogging

This is the easiest way, just turn on the front window defogging mode, then turn the wind speed to the maximum, turn on the A C switch, and then turn the temperature to the lowest, and the fog on the glass will disappear in a while.

In addition, the rear windshield and exterior mirrors of some models are equipped with electric heating, which can be used to eliminate fogging in about a minute after the switch is turned on. In addition, many vehicles now have a one-key defogging function, which can be turned on when fogging, which is convenient and fast.

If in winter, you can take the air conditioner hot air defogging, if the car has just started, do not start the air conditioning for the time being, wait until the engine is preheated for a few minutes, after the water temperature comes up, then start heating, adjust the air volume to the maximum, and then also open the front window defogging mode, and the fog will disappear in a few minutes.

2. Air convection

This method is suitable for very few situations, after opening the window, it can increase air convection, reduce the temperature difference between the inside and outside of the car, and weaken the fog formation conditions, this method seems to be very economical, but the situation that is really suitable is too little, if it is raining outside, it is impossible to open the window, and the wind blowing in is also quite limited.

3. Defogging agent

The above two methods are emergency measures in case of fogging, so is there any prevention in advance? Of course, there are ** defoggers on the market ranging from tens of yuan to hundreds of yuan, and the ingredients are not much different, and the only difference may be the durability.

To use it, you only need to spray it evenly on the glass surface and wipe it clean with a dry towel. Its principle is to use the method of surfactant to retain a certain protective film on the surface of the glass, change the surface tension of water molecules, and make the fog beads condense into large water droplets, so as not to block the line of sight. Other glass in the car can also be used, especially in exterior mirrors.

Fourth, dish soap homemade defogger

If you forgot to buy a defogger and want to use it temporarily, then mixing dish soap with water is a good method, according to the ratio of 1:6 to the dish soap and water, put it in a bottle, spray it before traveling, the effect is comparable to the defogger bought outside, but the durability is slightly worse.

Some car owners asked if they could use soapy water, hand sanitizer, laundry detergent and other alternatives to dish soap? Yes, yes, but none of them are as effective as dish soap.

The method is as follows: (1) Use a special defogging product.

In many markets and places such as auto parts cities, there will be some stalls selling special products for defogging and anti-fogging, such as defogging agents or fog towels. This kind of defogging agent is sprayed on the inner surface of automobile glass, and wiped clean, while removing glass dirt, it can also form a thin layer of transparent protective film on the glass, which can prevent the condensation of water vapor on the glass and form a fog layer, spraying can prevent fogging for ten days - half a month.

2) Open windows for convection.

If the fog is not heavy, you can open a gap in the windows on both sides (you can't do this when it's raining) so that the air inside the car will be convection, and the temperature inside the car will gradually approach the temperature outside the car, and the fog will dissipate. The advantage is that it can achieve the effect of turning on the air conditioner without increasing fuel consumption, but this method is not suitable for all situations, such as in the cold winter and when it rains.

3) with air conditioning system.

The usual practice is to turn on the fan and refrigeration switch in the car, so that the cold air blows on the glass and the fog will soon disperse, and the effect is quick and direct. This is because the cold air blows onto the glass, forming a "cold film" on the surface of the glass, preventing carbon dioxide from condensing on the glass and having a defogging effect.

Fog on the car glass solution:1. Air conditioning refrigeration defogging: using the air conditioning refrigeration effect to remove fog and reduce air humidity, you can remove window fog. Although it is fast and effective, it lasts for a short time.

2. Use anti-fogging agents. Spray a little defogging agent on the car window and wipe it clean. While polishing the glass, a thin transparent protective film is formed on the glass, which can effectively prevent water vapor from condensing on the glass to form a fog layer.

3. Open the window. After opening the window, the air convection can be increased, the temperature difference between the inside and outside of the car can be reduced, and the fog formation conditions can be reduced.

4. Use warm air to blow the windshield. If the fog is particularly large, you can use a warm air to blow the windshield, and let the warm air of the automatic air conditioner blow to the glass, and the fog will naturally disappear. The principle of opening the warm air to blow the windshield defogging is mainly to use the warm air to blow the windshield to evaporate the fog on the glass, and if the hot glass is on, there will be no new fog, and the water vapor will only condense into water in the case of cold wind, and the hot air will not appear in this case.

You can spray glass fogging remover, or open the door for a minute or two before leaving the car, and wait for the temperature inside the car to be about the same as the room before leaving, and there will be no fog!

"Safety First" First of all, we must make it clear that the generation of fog is caused by thermal evaporation, and thermal evaporation is caused by the temperature difference between the inside and outside of the car. Problem-solving: You can open the sunroof or windows to keep the air circulating freely inside and outside the car, and the fog will disappear naturally.

1.Open window gaps – If the fog is not particularly large, consider opening the driver or passenger side or both.

2.Turn on the cold air - pay attention to the air volume should be appropriately increased, and at the same time turn on the refrigeration switch, some cars have the option of direct defogging ,..

3.Turn on hot air – Hot air blowing on glass is better than using cold air, but the process is slower than cold air. When I first opened it, it did.

4.Anti-fog spray - You can buy car defogging spray in physical stores or **, and only a small part of it needs to be sprayed on the car.

5.Soap or dish soap – this is the most cost-effective and effective way to save money, we just need to get a little soap or soap from home.