I purchased a UV Haze filter for my XTi, mostly for lens protection (I'm a bit of a klutz, and the last thing I want is a scratch on my only lens). Alas, I didn't realize it at the time but the inside part of the UV filter has a bit of a finger smudge on it. No problem, I'll just unscrew it... ...except it's not coming unscrewed. It just spins around. I don't want to yank on it, for fear of damaging the lens. Am I really this stupid? Possibly. How do I get a stuck filter off of my camera lens?