The fog in the lampshade will affect the normal light transmittance, and even shift the direction of the light beam of the car light, causing astigmatism. The scattered light has no penetrating power and will increase the risk of traveling in snowy and foggy days and at night.
1. Large temperature difference
Car headlights usually have a vented rubber tube on the back cover for heat dissipation. Because of its existence, the moisture in the air has the opportunity to adhere to the inner surface of the lampshade to form water mist. In other words, in the case of a large temperature difference, the appearance of fog is normal.
2. Normal water ingress
Except for the temperature difference, after the vehicle is waded or washed, the stagnant water is not thoroughly dried or drained, which may cause water to enter the headlights through the rubber tube. As long as there is no stagnant water, it is normal.
3. Water ingress due to sealing problems
However, if the amount of water in the headlights obviously exceeds the standard, forming water accumulation, it can basically be determined that there is a problem with the headlight sealing. Either the large lampshade or the rear cover is damaged, or there is a problem with the sealing strip between the lampshade and the rear cover.
What should I do if the car lights fog up?
If the headlights only form water vapor underneath and the upper surface is still very clean, then it usually fogs up normally. It is recommended to put some desiccant and turn on the headlights frequently. By turning on the lights to dry the water vapor inside, it will usually disperse in about a week.
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