Cloudy headlights can reduce nighttime visibility, but you may not need an expensive replacement to improve their appearance.
A popular DIY method uses non-gel toothpaste, with a little baking soda added for extra grit if needed.Rub the mixture thoroughly over the headlights with an old toothbrush, then rinse with warm water and wipe them completely dry.
Finish with a thin layer of car wax to help protect the surface, then buff it off with a clean cloth..
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