You might try lighter fluid (naphtha) to get the gooey stuff off, even
if hardened gooey stuff is there.  Try a little on the plastic in an
area that can't be seen.

There is also a commercial product called " Goof Off " that would
probably work too...

Scott Olson    Missoula Montana

 [ I preserved your delightful Malapropism, Scott, since last night
 [ _I_ said "Iodized" instead of "Anodized".  (You meant to say
 [ "Goo-Off", I hope?)  -- Robbie   :-))