If your car headlights are slightly foggy, you can clean them using an abrasive, like toothpaste, and lots of scrubbing. First, clean the headlights with Windex or soap and water. Then, using a soft cloth, rub a small amount of toothpaste onto the wet headlight. Start scrubbing. Keep the surface wet and apply more toothpaste as needed. Once you’ve removed the protective coating, apply a sealant.
Above is the method of cleaning your car headlights. Read the article for step by step process for cleaning the headlights.