I did a thread search and didn’t really see a straight answer. The game is Demolition Man. The sheet of plastic translite back where it use to be white is dirty brown. I assume it’s from it being in a smoky bar at some point in its life. My gut is telling me its safe to put this in warm soapy water and lightly clean with with a sponge, but I’m afraid to try it until I hear some ideas. Anyone have a good method for this?