Originally posted by: McCarthy
Gonna make two assumptions here:
A) - bleep thought you meant the soft peel off sticker
B) - you don't mean the soft peel off sticker
If the hard plastic layer is peeling I can tell you one thing to NOT do - do NOT use superglue. It'll cloud the plastic. (and may run inside and do something nasty)
Pics might be helpful, but that'll take another camera or some creative mirror work. Seems like the best best would be to carefully remove it completely - blow the dust out with compressed air - clean up the old glue carefully and reglue it.
Silicon wouldn't cloud anything and would seal nicely, but it's not going to bond very strong. Something thick like that would be good though. Maybe this
http://www.elmers.com/homerepair/product_page.asp?pCode=E650A
Hope that helped. If not it's a free bump.