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Why do car headlights fog up and how to solve it?

Due to low temperatures in winter, the sun rises relatively late, making it difficult to see the road ahead clearly without headlights when driving in the morning. It can be seen that car lights are very important and can illuminate the road ahead for us. With the development of science and technology, there are more and more types of car headlights, including not only halogen headlights and xenon headlights, but also advanced LED headlights and laser headlights. But sometimes our headlights suddenly fog up while driving. What is the cause of this? How should we solve the problem of headlight fogging? Next, the editor will give you the answer.

Why do car headlights fog up and how to solve it? 1

There are a lot of foggy weather in winter, especially in the morning, so the headlights need to be turned on to illuminate the road ahead. But sometimes the headlights fog up, so what causes the headlights to fog up? First of all, it is because of the temperature difference. Everyone knows that the temperature difference between morning and evening is large in winter.

When the temperature difference between the inside and outside of the headlight shade is too large, water molecules in the air will gather in places with lower temperatures, causing fog to form on the surface of the shade. If the car headlights fog up due to temperature differences, we don’t have to worry at all. The fog inside the car headlights will dissipate on its own with the heat. But never bake it against the headlights, as this will cause great damage to the headlights.

Why do car headlights fog up and how to solve it? 2

Secondly, when the vehicle wades into water, it will also cause the car headlights to fog up. When we drive on a rainy day, the car will inevitably wade into water, and water vapor will enter the inside of the headlights along the ventilation pipe. At this time, we can open the back cover of the car headlight assembly and then turn on the engine. The fog inside the headlight will evaporate quickly.

Why do car headlights fog up and how to solve it? 3

Many people like to use a high-pressure water gun to clean the engine when washing their cars, and they directly cover the engine compartment without cleaning the water. At this time, the water vapor in the engine compartment will enter the headlights, causing the headlights to fog up. Therefore, we try not to use a high-pressure gun to flush the engine when cleaning the car. We can buy some desiccant and put it inside the headlights to absorb excess water vapor to prevent the headlights from fogging.

Why do car headlights fog up and how to solve it? 4

In addition to the problem of fogging headlights when we usually drive, we also encounter the problem of yellowing car headlights. So what causes car headlights to turn yellow? The reason why car headlights turn yellow is because the car is exposed to the sun for a long time, and the plastic headlight shades will turn yellow under long-term exposure to ultraviolet light. Also, headlights will turn yellow after being used for a long time. So what should you do if your car headlights turn yellow?

Why do car headlights fog up and how to solve it? 5

Many car owners will go directly to the 4S store to replace the headlights after discovering that their car headlights are yellow, but this is too expensive. In fact, we can use soapy water to clean the yellowed areas of the headlights and dry them after cleaning. Then polish and wax, and the headlights will become as bright as before.

Why do car headlights fog up and how to solve it? 6

When we use car headlights, we should pay more attention to the maintenance of car headlights. Try to park the car in a cool place and avoid prolonged exposure to the sun. And regularly check and clean the headlights to extend the life of the car headlights.

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