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How to Solve Fogging on Car Windows When Using Air Conditioning in Summer?

1 Answers

CalebLee

07/29/25 3:58pm

There are two main reasons for fogging on car windows when using air conditioning in summer: 1. High humidity and low interior temperature. 2. High humidity: When the humidity in the air is constant, if the temperature of the car window is lower than the dew point, fogging will occur on the car glass. 3. Low interior temperature: When there is a certain temperature difference between the inside and outside of the car, moisture will gather on the car glass and condense into fog. Here are some solutions to address fogging on the windows: (1) Wipe it clean yourself: Many car owners keep a small cloth in their cars, which is the most direct method. However, the effect of wiping is not ideal, and it is only a temporary solution, not very convenient. (2) Use specialized anti-fog products: Before driving, evenly spray the anti-fog agent on the surface of the car window glass, then wipe it clean with a dry towel. The principle is to form a protective film on the window surface, altering the surface tension of water molecules to prevent moisture from condensing on the glass, thus avoiding fog formation. One application is effective for about 10 days. (3) Open the window slightly: Opening the window can appropriately increase the interior temperature and reduce the temperature difference between the inside and outside of the car, effectively solving the fogging issue. Of course, high-end cars come with temperature adjustment features; simply adjusting the interior temperature slightly higher will suffice.

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