What are the methods to deal with yellowing car headlights?
2 Answers
Car headlights yellowing can be addressed by: 1. Cleaning the headlights with soapy water; 2. Sanding and polishing the lens surface. Methods for headlight maintenance include: 1. Regularly inspecting the lens cover to avoid water droplets; 2. Periodically replacing the headlights; 3. Properly adjusting the headlight height; 4. Using high-quality bulbs; 5. Preventing foreign object impacts; 6. Parking in shaded areas when possible to avoid direct sunlight. The standard procedure for headlight adjustment is: 1. Drive the car onto a flat and open road surface; 2. Turn on the headlights and adjust the low beam projection point to about 30m from the vehicle, making the two projection points coincide; 3. Adjust the high beam projection point to be parallel with the ground.
As a seasoned driver with over a decade of experience, I've encountered the issue of yellowing headlights multiple times. This is primarily caused by prolonged sun exposure and oxidation, which dims the lights and poses a danger for night driving. My usual solution involves first cleaning the headlight surface with car wash soap, then gently sanding away the yellowed layer using 2000-grit sandpaper, followed by applying a specialized UV protective wax to seal it. The entire process takes about half an hour and works remarkably well, restoring about 80% of the brightness. However, remember not to sand too aggressively, as this could damage the plastic housing. After each treatment, I make it a habit to regularly check the headlight condition and recommend maintenance every six months to extend their lifespan. If left untreated, it not only affects driving visibility but might also get you pulled over and fined by the police—safety always comes first!
