Just an F.Y.I. I was at my mother's today and went down cellar to look for something and I came upon a bottle of Meguire's #17 Professional Plastic Cleaner, so I brought it home and tried it on my 5 out of 10 clear headlights. It worked the nuts and it took about 5 minutes. Not sure where to find it though, it was my father's and he has been gone 6 years now so it is at least that....give it a try if you can find it...