In the case of fog in the headlights, we can not worry too much. After the lights are turned on for a period of time, the fog will be discharged from the lamp with the hot gas through the trachea, which basically will not damage the headlamp and the electrical circuit.
In this case, it is not allowed to bake the headlamp, which will easily damage the headlamp, because the appearance is made of plastic, and the extra heat can easily bake the lamp cover, and this damage is irreparable.
In addition to weather changes, human factors can also make the lights water, such as vehicle wading, car washing, etc.
Because the engine and exhaust system are large heat sources, rainwater will form a large amount of water vapor. Along the vent pipe, some water vapor will enter the headlamp. Car washing is more direct. Some car owners like to wash the engine compartment with high-pressure water guns, watching the mud and leaves being shot back by the high-pressure water gun in their hands. After washing, the accumulated water in the engine compartment was not treated in time. After the engine compartment cover was closed, the water vapor could not be quickly distributed outside the vehicle, and the water vapor trapped in the engine compartment might enter the interior of the headlight. For the cleaning work in the engine compartment, we should use cotton or cloth to wipe, or use high-pressure air to blow, as far as possible to avoid the engine parts "wet".
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