How to Defog the Car Interior?
2 Answers
Here are some quick methods to defog the car interior: 1. Cold Air Blow: The most common method is to turn on the AC cooling switch + maximum airflow to the front windshield + external circulation (if the external humidity is higher than inside, internal circulation is recommended). This provides the fastest effect. 2. Rear Windshield Heating Wire + Rear Wiper: Almost all cars now have a "rear windshield heating" function. It helps melt snow and remove fog. During rain, using it along with the rear wiper enhances the effect. 3. Wiping the Glass with Windshield Washer Fluid: This is a convenient method when outdoors. Use a towel dampened with windshield washer fluid to wipe the inside of the front windshield, four side windows, and both side mirrors. Always keep a bottle of windshield washer fluid in the trunk for emergencies. However, the effect doesn’t last long, so it’s best to combine it with the AC for sustained defogging. 4. Wiping with Dish Soap: Dilute dish soap with water (ratio 1:6), apply it evenly on the interior glass with a sponge, and wipe it dry with a clean towel once dry. The effect is similar to anti-fog spray but lasts slightly shorter. It’s cost-effective, though.
Foggy windows inside the car are really annoying, especially in winter or humid weather. The most common method is using the air conditioning system to defog. After getting in the car, I usually turn the fan to maximum speed aimed at the windshield and switch to external circulation mode, as it allows dry air to enter the cabin while setting the airflow to windshield-only mode. If the fog is severe, I use cold air; if the temperature is too low, I switch to warm air to speed up moisture evaporation. Keeping the windows clean is also crucial—dirt makes fog accumulate more easily. Regularly wiping the glass with a clean cloth can prevent many issues. When parking, don’t close the windows completely; leave a small gap for ventilation or place moisture absorbers like specialized dehumidifying bags or small packets of lime powder under the seats—affordable and practical. Remember, never let fog obstruct your vision while driving—safety first! Starting the car a few minutes early to preheat the system can also save a lot of hassle.
