What Causes Fogging on Car Windows?

[Nina]

The fogging on car windows is caused by high interior temperature, unheated glass, or low interior temperature. The specific reasons are as follows: High interior temperature: When the interior temperature is high and the outside is cold, moisture inside the car condenses on the cooler glass, forming fog. In this case, turning on the air conditioning to direct warm air toward the windows can help clear the fog. Unheated glass: Before the glass is heated, warm air can temporarily cause more fogging. Using cold air to blow on the windows or slightly opening the windows to equalize the temperature inside and outside can prevent fogging. Low interior temperature: When the interior is cold and the outside is humid, moisture will condense on the cooler outer surface of the windows. This can only be removed with wipers. Adjusting the air conditioning settings to prevent cold air from blowing directly onto the windows can also avoid external fogging.