Many car owners discover，The car is placed outside，Wake up early the next day to find that water droplets fog in the inside of the car headlight。Is this situation in the water? In fact, the problem may not be so serious。

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Winter temperature difference is large, causing condensation inside the headlights

There is a ventilation pipe road connecting the seabet iooutside world in the structure of the car headlight，Its purpose is to light up after the headlights are lit，temperature rising，Eliminate the internal expansion of gas from the headlights through the ventilation pipeline，After the headlights are extinguished，Decrease temperature，Internal pressure difference becomes larger，Inhale external air through the ventilation pipe。During this breathing process，It will inhale humid air，Caused the headlights to condense into fog。Does the manufacturer know this vulnerability? Factory of course understands the disadvantages，To prevent moisture、Dust into the inside of the headlights，A "dry filter element" is set up in the ventilation pipeline for filtering。Just in the temperature difference for a long time、Run in a humid environment，The effect of the dry filter element will be discounted，The probability of wet air entering the headlight will increase，It is not surprising that the fog caused by headlights。

Davidment, fog after washing the car

Careful car owners may find，After heavy rain or car washing，Mist may appear inside the headlights，What is the reason? This point can be analyzed in conjunction with the above point of view，Also is a problem of sea lights.，Especially models of more than seven or eight years，Big lantern sealing strips may lose activity，The possibility of wet seabet myair entering is more likely，Furities in the headlights are very likely。

In addition to the sealing strip，The shell of the plastic will also be like a sponge after heating，Absorb water in the air，Of course the effect is not intuitive。

How can I solve the situation where the headlights are foggy?

The cause of the foggy lights，Most car owners are not interested，Everyone just wants to know how to solve。Actually the method is not difficult，Under normal circumstances，As long as the headlights are used normally，Use the temperature generated by the headlight to gasification，Use the circulation of the ventilator，Dry the water vapor inside the headlight。If the mist inside the headlight is serious，The owner can disassemble the headlight back and cover，Dry the headlights。It is recommended to dry naturally，Forced drying will accelerate the sealing strip and lose activity。

Another，A few cases where there are not strict sealing of headlights，In this case, the owner should repair it in time，Otherwise, if it is serious，I can only change the headlights。