I have a UV filter stuck on one of my lenses, and I can't budge it. I've applied as much force as I feel I can without breaking the lens. (It caused a good deal of flex in the lens barrel.) I've tried just about everything else short of soaking it in break-free to try and loosen the threads. Does anyone have any practical ways of getting this thing off. My next recourse is to send it in to Canon and let them take care of it.