Here’s how: Clean your dirty headlights with soapy water. It's important to remove dirt and debris. Spray a small amount of WD-40 directly onto the headlight lens or (preferably) onto a clean ...
Note: The following procedure will not repair damage to the inside lens of the headlamp ... the finer the grit. If the headlight is just dull or yellowed, start with the 1,500 grit and work ...