Cee Baileys lens effect
I have a CB +8 screen installed. The first week I noticed a flaw in the bezel around the tach. Looked like it had been melted by the sun. Okay, no biggie. Cheap plastic part....etc. Then a couple of weeks later I noticed a bubble in the black plastic right behind the windscreen. Looked like it had gotten hot.
Time to look closer. I noticed that the CB screen has clear edges. All other screens, that I have looked at, have a burnished edge or a strip of some kind on the edge.
I think the edge of the CB was acting like a lens and focusing the sunlight on the plastic parts. I used a magic marker and went over the edges of the screen. So far so good. No more mysterious meltings.