Fortunately, you can efficiently clean the inside of headlights without taking them apart:

Foggy headlights inside. Use a hairdryer to dry out the moist air without breaking the seal. Can accumulate inside the headlight casing due to the cracks and pitting that develop with time. The next option would be to use one of the.

Led and xenon headlamps can also fog up from the inside. This way you get a much more accurate idea of exactly what you are dealing with. If you see that the car headlights are only forming water vapor underneath, and the upper part is very clean, then it is generally a foggy condition.

Now dip a rough pad into the warm water. Make a magnetic sponge or cloth. Before you begin, you’ll want to make certain you’re working with a clean surface.

As it heats up, it should dry out. Once you are satisfied it’s clean, dry the headlamps using the paper. How do you clean inside the headlight lens without scratching the fragile inner liner (anti fog layer)?

Pull the housing off the car. Clean the lens with the detergent solution. Foggy headlight is a situation when water vapor gets inside the headlight glass.

Here too, it isn’t absolutely necessary to. It's normally caused by a difference in temperature inside and out. It attacks the surface of the plastic and causes it to get little pock marks and checks in it and so.