What Causes Water in Headlights?

[VonEmerson]

There are two main reasons for water accumulation in car headlights. One is the presence of a vent tube at the rear cover of the headlight, through which moisture can enter and condense on the lens, especially during seasons with significant temperature differences like winter and the rainy season. The other reason is poor sealing of the headlight cover, which easily allows moisture to seep in. Solutions for water in headlights are as follows: 1. Minor Water Accumulation. For slight moisture inside the headlight, there is no need for excessive concern. After the headlights are turned on for a while, the fog will dissipate through the vent tube with the heat, which generally does not damage the headlight or electrical circuits. 2. Severe Water Accumulation. If there is significant water accumulation inside the headlight, it is advisable to dismantle it, remove the lens cover, and let it dry. After drying, inspect the headlight surface for any damage, and replace if necessary.