What should I do if the windshield fogs before rainy days?

When the windshield fogs in rainy days, you can turn on the car air conditioner and blow the window quickly with strong wind to remove the fog. First of all, the car air conditioner blows cold air, which can quickly reduce the temperature inside the car. Blowing the window can quickly reduce the temperature of the window, make the temperature of the inner surface of the window reach the same temperature as that of the outside of the car, and make the fog disappear quickly.

But if you turn off the air conditioner at this time, the temperature inside the car will rise again after a while, forming fog. Therefore, it is generally necessary to turn on the air conditioner for a while and use the air conditioner compressor to remove the moisture in the car, so that the fog can stay in the car for a long time.

In rainy days, avoid fogging the window.

First, window convection

If it is found that the fog in the car is not big, you can open a gap in the windows on both sides to make the air inside and outside the car form convection, reduce the temperature difference and slowly disappear the fog. The principle of this method is the same as turning on the air conditioner, but it does not increase fuel consumption. At the same time, it should be noted that the window opening seam should not be too small because of the rain, and it is effective to adjust the window opening range according to the rain.

Second, detergent antifogging.

Wet the soap with water to make it soft, and then apply it evenly on all glass surfaces (it must be uniform). When the soap on the glass is dry, wipe it off with a paper towel or newspaper. Be careful not to use a towel, it is easy to leave small debris with a towel. However, this method has a small disadvantage in defogging in rainy days, that is, a small amount of soap will remain on the glass, but it will not affect the overall vision.