If the Headlights Are Foggy, Does It Have to Be Water? How to Remove Water Mist?

Reasons why headlights fog up

During the rainy season, heavy rain or winter, when the headlights go out and the temperature inside the lamp unit drops, water molecules in the air can easily enter the cavity of the lamp unit through the rubber vent pipe or vent hole. 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 molecules in the humid air will gather from high-temperature places to low-temperature places, increasing the humidity in these parts, and then condensation on the surface of the inner lampshade. , forming fog.

There is also a situation like the water mist generated after the vehicle is waded into water or the car is washed. Since the engine and exhaust system themselves are relatively large heat sources after the vehicle is waded into water, rainwater will form a large amount of water vapor, which will flow along the ventilation system. Air pipe, some water vapor will enter the headlight. Car washing is more straightforward. Some car owners like to use high-pressure water guns to flush the engine compartment. After flushing, the water in the engine compartment is not dealt with in time. After the engine compartment cover is closed, the water vapor cannot be quickly dispersed to the outside of the car, which is boring. Water vapor in the engine compartment may enter the headlight.

If water vapor is formed only on the bottom of the headlight but is still dry on the top, it is generally a normal situation of fogging. It is recommended to put some desiccant in it and turn on the headlight frequently to dry the water vapor inside. After a period of time, it will become natural. Disperse.

If the water accumulation inside the headlight is serious, it is recommended to go to the repair shop for inspection as soon as possible. Disassemble it and open the lamp cover. After drying, check whether there is any damage or possible leakage on the surface of the headlight. If no abnormality is found, usually It is recommended to replace the headlight rear cover sealing strip and breather pipe; if there is serious damage, the headlight assembly may need to be replaced. In winter and rainy seasons, it is best to develop the habit of regularly checking vehicle lights, especially after the vehicle has been waded into water. Discovering and solving problems as early as possible can give your car the greatest protection.