jdeiana said:There is not pitting - the deet seems to have reacted to the plastic to make "foggy" spots - the screen is still smooth to the touch - I scrubbed it as hard as I dare with dawn and sponge - nothing worked - I think it permanently damaged the plastic
jd,
No, it's not pitting. And it's not a stain. It's called 'polymer crazing', and it's permanent damage at the molecular level.
(You can look it up on wikipedia, if you want to be bored with technical chemical explanations.)
Wax won't work. If you're very, very lucky...and the crazing damage isn't too deep...a very mild rubbing compound might help.
Some folks have had some success using the original crest toothpaste (as rubbing compound) and cotton balls.
But in all likelihood, the cover will need replaced.
I once worked for a company that used 'bullet resistant' lexan for a particular product. Someone decided to clean the lexan with a 'contact cleaner' type spray.
We were able to break apart the 1 inch thick 'bullet resistant' lexan with our bare hands. It crumbled away.
good luck,
mike