The rear window might be tricky becuase of the defroster and you could ruin it On my old mx6 i didnt bother with the back window. I used the razor and shit like everyone else in here is saying but goo gone works wonders on getting the tint glue residue off , i put it on an old rag and it rubbed right off.Just dont get it on anything besides the window cause it will eat your door panels up and shit.