Originally Posted by DFGum
WD-40 will eat away stuff DO NOT USE IT.
It breaks down rubber and plastics.
Old topic, I know, but Crayola's website now actually recommends WD-40 for cleaning crayon from plastics. I also found dozens of other parents who successfully used it without damaging the screen.
I'll be giving it a try on a small test area before I tackle the crayon though.