Using a rag and some water to rinse of afterwards, simply scrub down your headlights with toothpaste and watch the grime come right off. However, it is important to do it the right way so that it does not end up looking worse. If you have glass headlights, don’t try this as toothpaste is not abrasive enough. Finally, if you are going to go through with this, make sure you do so in a slow and steady manner in order to avoid any touching on the surfaces of the car. Follow these steps and you’ll have headlights that are as clean as new in no time! Clean your headlights with toothpaste [instructables] Use toothpaste to clear up car headlights [Reddit discussion]