If you have headlights that need to be cleaned, there are a few things you can do. The first is to get a lemon. Lemon juice is a great cleaner and it will help remove any built-up dirt and debris from the headlights. You can also use a plunger to suction onto the end of the lemon and pull until the dirt and debris pops out. Finally, use a vacuum cleaner to clean the entire headlight area.