How to treat yellowing of car lights?

We often face the problem of yellowing car headlights, which leads to reduced illumination and difficulty seeing, especially in the winter, but you can solve this problem very easily:

1. Place a wide piece of paper around the lamp
2. Scrub the lamp well using sandpaper No. 1500 (very fine). The process may take five minutes or less, but you will find that a lot of dirt begins to come out.
3. After finishing, polish the lamp with metal polish by spreading the material on it, and then rub it well until it is gone.