Have ya ever left a CD & jewel case in your car in direct sunlight?
I have.
Apparently it gets pretty darn hot in my truck cab. Weird thing was, the CD that was in the case was fine. It was sticking out the top while the jewel case was all shrunk and melted down around it.
I left a cassetfe tape on the passenger seat and it melted the case and the cassette housing as well. Interesting to note that the CD itself was not affected.