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What to Do When the Outside of the Car Window Fogs Up with the Air Conditioning On?

1 Answers

CameronFitz

07/30/25 8:58am

Solutions for fogging on the outside of car windows when the air conditioning is on include opening windows, using cold air to defog, using warm air to defog, and applying defogging agents. Specific methods are as follows: Opening Windows: When the fog is not heavy, you can appropriately open both side windows to allow air convection. This helps eliminate the temperature difference on both sides of the windshield, making it difficult for fog to form naturally. Cold Air Defogging: Turn on the cold air of the air conditioner, press the A/C button, adjust the air vent direction to blow toward the windshield, set the fan speed to the highest position, and switch the air circulation mode to external circulation. This facilitates air exchange between the inside and outside of the car, reducing the temperature difference and preventing fog formation, thus achieving the effect of defogging. Warm Air Defogging: You can first turn on the external circulation, wait a few minutes, and then switch to internal circulation mode. Using warm air to defog in winter is more comfortable and also prevents the windshield from fogging up again. Using Defogging Agents: Spray a layer of defogging agent on the windshield to form an effective protective film, effectively preventing water vapor from condensing on the glass and forming a fog layer.

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