How to Remove Fog from Glass?
2 Answers
There are several methods to remove fog from glass: 1. Detergent-based anti-fogging: Detergents can disrupt the attraction between water molecules, reducing their surface tension and allowing water molecules to evenly distribute on the treated glass surface, forming a water film. You can use soap or dishwashing liquid for this purpose and wipe it off with a paper towel. 2. Air conditioning cooling defogging: In summer, fogging on car windows can be caused by low temperature or high air humidity. You can turn on the air conditioning and direct cold air towards the windshield, utilizing the dehumidification function of the air conditioning to remove fog from the windshield. 3. Using external circulation when windows cannot be opened: Turn on external circulation for defogging. The correct vent position should be able to blow air towards both the windshield and the footwell, or just towards the windshield.
I have a lot of experience with this issue. Fogging mainly occurs due to the temperature difference between the inside and outside of the glass, combined with high humidity inside the car. The simplest solution is to turn on the air conditioning, set the fan to high, and direct the airflow towards the windshield. Make sure to press the A/C button to activate the dehumidification function—this should clear the fog in about 20 seconds. In winter, you can switch to warm air, though initially, the fogging might worsen until the warm air heats up the glass. It's best to turn on the warm air a few minutes before driving to preheat the glass. Additionally, having too many passengers in the car can accelerate fogging, so slightly opening the windows for ventilation helps a lot. To prevent fogging, you can wipe the inside of the glass with soapy water, let it dry, and then polish it with a dry cloth—this can last for two to three days. If fog appears while driving, never wipe it with a towel, as it’s too dangerous.