What is the best readily available cleaner to use on the interior plastic (door panels, dash, etc) -it has imbedded dirt. I tried simple green on a section and it worked ok, but I dont know if this stuff is safe enough to go glopping it all over. Also, the "dope scope" or telescoping interior light (this is a fox car) "chirps" when it is locked into position and the car is moving. When I push on it the chirping stops. Not sure how to fix that but it sure is annoying. Thanks!