What to do when there is fog inside the rear tail light due to water ingress?

[HenryDella]

Usually, the so-called water ingress and fogging occur during normal use when the tail light accumulates water or develops fog inside due to poor sealing. When fog appears inside the tail light, it typically takes about 1-1.5 hours for the fog to completely dissipate when the light is on. If the light is off, the fog inside the tail light will only disperse after parking in a dry environment with humidity below 50% for more than a day. Solutions are as follows: 1. Remove the dust cover of the tail light to allow the water vapor inside to escape quickly, though the process is relatively slow. 2. Turn on the tail light for 30 minutes to raise the internal temperature of the tail light, accelerating the evaporation of small water droplets inside. 3. Use an air gun to blow air into the tail light, promoting air circulation inside, which can speed up defogging and dehumidification. The air gun must undergo water removal treatment.