Fogged-up car windows can be cleared using warm air defogging, defogging products, or air conditioning defogging. Using Warm Air Defogging: In cold winter weather, many people use warm air, making it the most suitable method for defogging. However, warm air defogging should not be used after fog has already formed. If you turn on the hot air while driving when the windows are already fogged up, the fog on the windows will actually worsen. This is especially noticeable in rainy weather when the air is humid, as it can quickly turn the windshield into frosted glass, which is very dangerous. Therefore, it is recommended not to use hot air to defog the windshield while driving. Instead, it's best to dry the windows with hot air before starting your journey. Using Defogging Products: There are many defogging products available now. Spray them onto the windshield, wipe them clean with a cloth, and spread them evenly. While cleaning the glass, these products also form a thin, transparent protective film on the surface, preventing water vapor from condensing into fog. This method can effectively keep the windows clear for about one to two weeks, making it quite convenient. Using Air Conditioning Defogging: When the windows are fogged up, turning on the air conditioning to blow air onto the glass can quickly remove the moisture. The vents below the windshield will direct a large amount of air onto the glass, rapidly dispersing the humidity. This also helps reduce the temperature difference between the inside and outside of the glass, effectively eliminating fog. This method works very quickly but is not practical in winter, as it can make the occupants feel very cold. Additionally, repeatedly turning the air conditioning on and off can pose a safety hazard while driving. This method is generally suitable for temporary use during rainy weather.
