Chongqing Yuntu Automobile Trading Co., Ltd.

Chongqing Yuntu Automobile Trading Co., Ltd.

Why do Petrol Car headlights appear mist or get water?

2025 10/15

Many drivers will encounter water mist in the headlights of Volkswagen Car after rain or after washing the car. In fact, it is normal for Petrol Car headlights to mist, and car owners don`t need to worry too much. When the headlight is working, it will generate a lot of heat. There is a heat dissipation vent on the back cover of the headlight. Moisture in the air will enter the headlight through this vent, adhere to the lampshade, form water droplets, and then flow down the lampshade. This usually occurs during winter and rainy seasons.

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1. The headlights are foggy
During the rainy season, heavy rain or winter, when the headlights of Volkswagen Car are turned off and the temperature inside the lamp unit drops, moisture in the air can easily enter the cavity of the lamp unit through the vents. When the temperature inside the headlight cavity is unbalanced and the temperature difference between the inside and outside of the lampshade is too large, water vapor in the humid air will condense on the surface of the inner lampshade, usually concentrating on the lower half. In this case, we do not require additional treatment. When the weather clears after the rain, the water mist will dissipate, or we can turn on the headlights to speed up the dissipation of the water mist. Usually after the headlights are turned on for a period of time, the mist will be discharged out of the lights through the exhaust pipe along with the hot air, and will not cause damage to the headlights and circuits.
Occasionally, you may find foggy headlights on Volkswagen Car when you wash your car. This is because the water cannon used by car washers is too high or the headlights are sprayed for too long. Water vapor from Volkswagen Car will enter the headlights under pressure and condense on the inner wall of the lamp cavity, causing water mist to appear on the inner wall of the lamp cavity. The same situation generally does not require special treatment, and the water mist will dissipate naturally.
Some Petrol Car owners will ask, if the headlights are foggy, can they be dried with a dryer? The answer is no, because the headlight covers of most Volkswagen Car are made of special plastic. If the baking temperature is too high, it will easily cause the headlights to age and turn yellow, or even crack when exposed to cold.
2. Water enters the headlights
Water entering the headlights of a Petrol Car is different from fogging the headlights. After water enters the headlight, the water droplets on the inner wall of the Petrol Car's lampshade will not evaporate for a long time, and serious water accumulation will occur inside the lamp cavity. If you find this phenomenon, you should go to a professional store for disassembly and maintenance as soon as possible.