The Right Way To Clean Your Car Headlights


It doesn’t matter how fast your car is, you can only drive as fast as you can see down the road ahead of you. When the plastic lenses on your headlights get hazy and oxidized, they disperse the light and reduce your visibility. Here’s how to clean them.

Things You’ll Need

  • Dish detergent
  • Car wash cloth
  • Several microfiber detail rags
  • Painter’s tape
  • Rubber spatula
  • Razor
  • Foam sanding block or large, thick household sponge
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Step 1.

Do one headlight at a time. Start by washing the lens and surrounding area completely using dish detergent. Rinse and allow to dry completely.

Step 2

Apply painter’s tape to the car’s body around the headlight, making sure to cover the rubber seal around the headlight (if there is one). Apply more tape for a wider margin of safety. Use a rubber spatula to press the tape down and work it into the crevices around the light. Use a razor to trim away excess tape where the rubber seal meets the lens.

Step 3

Wrap a strip of 500-grit sandpaper around a foam sanding block or large sponge. The foam helps distribute pressure on the sandpaper so you don’t leave deep gouges in the lens.

Sep 4

Press the sandpaper-wrapped block to the headlight lens, and start sanding the lens in a back-and-forth motion.

Step 5

Keep sanding until the surface is uniformly frosty and completely opaque. Keep sanding until it feels as silky smooth as sanded pinewood.

Step 6

Wipe the headlight down with a microfiber cloth to check your work. Be sure you adequately sanded edges and corners. Then, rinse the headlight with clean water.

Step 7

Fill a gallon pitcher with water. Add dish detergent and drop in a few pieces of 1000- and 2000-grit sandpaper to soak.

Step 8

Fill a spray bottle with soapy water from the pitcher and heavily mist your headlight. Wrap the foam block 1000-grit sandpaper and sand the headlight just as you did with the 500-grit. Keeping the spray bottle in your other hand, give the lens a fresh spray every time you change sanding directions. Keep it wet and slippery.

Step 9

Sand until the paper slides smoothly over the headlight lens and you can’t feel any rough spots. Rinse and dry the lens, preferably with compressed air.

Step 10

Wash, rinse, and repeat with 2000-grit paper. Rinse and dry the lens completely when you’re finished. The lens should be almost uniformly clear.

Step 11

Fold a microfiber polishing rag into quarters. If you’re using liquid headlight polish, run a thick line of polish along the top of the headlight. If you’re using a paste-type plastic polish, load your rag up with about an ounce and smear it all over the lens.

Step 12

Work the polish all over the lens until it’s covered uniformly, then add a bit more polish to your rag. Polish the lens with medium pressure, using the same method you used while sanding. Make complete passes over the lens, polishing in one direction; then flip the rag over to a cleaner side for another pass.

Step 13

Wash the headlight with detergent water, rinse thoroughly, and allow to dry completely. Wipe the lens down with rubbing alcohol and a clean, lint-free towel. Spray with lens sealer and wipe it with a lint-free towel as directed by the sealer packaging.

Step 14

Step back to admire your work. With the lens completely clear and smooth, and the sealer filling in any minor imperfections to form a perfect, glass-like sheen, your headlight should glitter, jewel-like, in the sun. Now repeat all of these steps on the other headlight.

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