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Keep Driving Illumination Good in Kinds of Climate Conditions.
Moisture in headlights is quite simply a matter of science at work. Since most headlights generate heat, they need to be ventilated, which means that they feature small vents that can suck in moisture when the car is turned off. If the outer lens cools more quickly than the air inside the headlight unit, it can cause condensation. This explains why you most often encounter condensation in the morning after your car has been parked overnight, rainy day or winter. Sometimes, a crack in the housing itself or bad headlight seals can also allow moisture to creep in.
How to solve the water or moisture in headlights?
- Check that all vents are free from blockages. Turn on the low beam for 20 mins to raise headlight temperature and evaporate condensation.
- Remove bulbs to allow moisture to evaportate from inside the housing. Heat with a hair dryer or heat gun on low tempertature to speed up the process.
- Put a moisture absorbing silica-gel desiccant packet inside the headlight.