if its on the inside of the window, watch the defroster lines, make sure you dont cut through them. Use some goo gone and it should come loose.

How hot was it outside??

Jason 00 Audi S4, 2.7 Bi-turbo quattro 01 S10 Xtreme, 4.3l 98' Contour SE with some mods 96 Cavalier (beater)