I agree with Ed - screwdrivers and hammers around window glass is definetly a no-no Alex! Old or aged glass can be very brittle and sometimes all you have to do is look at it the wrong way, and it will shatter or chip. A little practice using the tool properly, (I prefer the arrow head one), will eliminate the mystery of window trim removal. The first one is the challenge, after that they are pretty easy ! Maybe a little practice on some junkyard jewels, till you get the hang of it?