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What causes fog in car lights?

What causes fog in car lights? 1

On early winter mornings, many car owners will see fog appearing in their car lights. Some will automatically disappear soon after driving, and some will remain inside, causing great inconvenience to car owners when using driving lights. How does the fog in car headlights come about?

Improper car washing and water wading may cause mist to enter

Fogging in car lights is mostly caused by car owners wading in water or improperly washing the car.

What causes fog in car lights? 2

Manager Lu told reporters that when cleaning the interior of the car, you should scrub it with a towel or blow the engine with compressed air, but not directly flush it with a high-pressure water gun. If car owners often use high-pressure water guns to wash car lights or the interior of the car, it is easy for water droplets to flow into the air vents, and water mist is likely to appear inside the car lights.

In addition, frequent wading in deep water can also easily cause fogging in car lights. For example, self-driving enthusiasts like to drive through deep water, or car owners have to let their cars wade in heavy rain. Normally, once the water is deeper than the wheels, it will enter the lights through the vents. Especially on heavy rainy days, it is most likely to cause water to enter the headlights, and the brightness of the headlights will also be affected after water enters. If a lot of water enters, the headlights may be damaged. Therefore, car owners are reminded to check their car lights after driving on rainy days. If they find that there is too much fog in the car lights and this happens frequently, they should go to a repair shop for repairs in time.

Changes in temperature difference cause fog to enter the car lights

It is understood that there is a plastic ventilation channel on the back cover of the headlight. The thermally expanded gas is discharged through this channel. Sometimes some moisture enters the vent hole, causing slight fogging. This kind of fog caused by temperature difference changes often occurs in winter, rainy season or foggy days.

After-sales service manager Lu Shaojun told reporters that in order to pursue better lighting effects, most of the current car lights adopt lens type. This kind of light light is more concentrated, while only a small area of the headlight mirror is heated, and moisture mainly accumulates in it. It's on the mirror outside the lighting area, so it's easier to spot. Car owners should not panic if fog enters the lights. Under normal circumstances, it will not affect the normal use of the lights, and there is no need to replace the lights.

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