How to Remove Fog from a Car?
2 Answers
Methods to remove fog from a car include: 1. Keep a damp towel in the car and wipe off the fog when it appears; 2. If fog is caused by a significant temperature difference between the inside and outside of the car, open the windows to equalize the temperatures; 3. When the windshield fogs up, switch the air circulation system to external circulation; 4. Turn on the automatic climate control; 5. Spray a layer of anti-fog agent on the windshield. The reasons for fog in a car are: 1. Under certain humidity conditions, when the window temperature is below the dew point, condensation forms on the window surface; 2. A temperature difference on both sides of the window causes the water vapor pressure on the cooler side to be lower than the surrounding environment; 3. Moisture gathers on the glass surface and forms tiny droplets, creating fog.
Having driven for over a decade, window fogging has always been a headache for me. Fog typically forms due to significant temperature differences between the inside and outside of the car and high humidity, especially noticeable in winter. When I get in the car and see blurry glass, I usually turn on the air conditioning immediately, set it to the windshield position, and crank the fan speed to maximum. The AC dehumidification mode is particularly effective, quickly drying the air and clearing the fog in less than a minute. It's important to keep windows closed to prevent moisture from entering, and placing silica gel desiccants inside the car can help absorb humidity. I always keep anti-fog spray in my car—just wiping the glass can prevent fogging. Additionally, in winter, avoid turning on the heater right away; instead, open the windows slightly for ventilation before starting the AC to prevent worsening fog. Regularly cleaning oily residue from the glass is also crucial, as it can cause fog to form faster. These small tips have helped me drive safely for years.
