How to Fix Water in Headlights?
2 Answers
Different levels of water ingress in headlights require different repair methods. Below are the various repair approaches: 1. Slight Water Ingress in Car Headlights: For minor cases of moisture inside the headlight, drivers need not worry excessively. After the headlights have been on for a while, the fog will dissipate through the vent tube along with the heat, which generally does not damage the headlight or electrical circuits. 2. Severe Water Ingress in Car Headlights: When there is enough water inside the headlight to 'raise fish,' it indicates severe ingress. In such cases, the headlight should be disassembled, the lens opened, and dried thoroughly. Afterwards, inspect the headlight surface for any damage or potential leak points. If abnormalities are found, it is recommended to replace the headlight rear cover seal and vent tube.
I've been driving for several years and hate it when headlights get water inside, which can cause bulb short circuits or fogging that affects visibility. First, park and check for any cracks in the lens or aging seals that might be leaking. Wipe the exterior dry with a clean cloth, then remove the headlight rear cover, take out the lamp body, and let it air-dry in a ventilated place for a day or two. Alternatively, use a hairdryer on low heat to dry out the internal moisture. Once completely dry, try resealing it—applying silicone sealant to the gaps works well for waterproofing. If the water damage is severe and the bulb is burnt out, it's best to replace the entire headlight to avoid accidents during night driving. Prevention is simple: avoid using high-pressure water jets directly on the lens when washing the car and regularly check the seals for wear. Doing these yourself saves repair costs, but for serious issues, it's safer to visit a professional shop rather than take risks.
