There's a video being shared on Facebook that shows how to clean your old yellow headlight covers, DON'T DO IT! Watch the video below this first!!
So the explanation says you can use bug spray containing DEET to get a fresh new look. It does work, but there are some other hazards that could harm your car, and the finish will not last, and there's a reason why. Watch the following video below and you will see, listen closely while you do.
I've noticed that it melts the plastic when you spray the bug spray on to clean the headlight. You can see how it works because the guy in the video touches the finish and his finger sticks and his fingerprint appears.
The bug spray is also bad for the paint. When you are done and the light looks great, the rain will wash the bug spray onto the paint and then your paint will either melt or be ruined. It also ruins the rubber around the light. So, as you can see from the video, that it works, but it also ruins several parts of your car.
The same guy has a video to show you how to clean it properly, he even tells you the cost. Only $10 per headlight. Considering how much headlights cost, that seems like a bargain. He shows you which products to buy. You can also buy the equivalent if you are partial to a certain brand.
Believe it or not, you have to use sandpaper, and there is also a spray you use to shine up the plastic and protect it. Sometimes people jump on the bandwagon without checking into the trend to see if it's any good.
The second method he uses is more of a permanent fix, but you will need to protect your paint and around the light. Getting some painter's tape will help. He has a full list of things you need to buy and it looks great when you are done.