A few weeks ago I purchased a Hoya filter set and some step down rings. Installed the polerizing filter on one of the rings and they became mated for what I hope is not life. Any suggestions on how to seperate the two. I don't understand just how filters get stuck so tight but I've read where others has had this problem as well. The filters were not the most expensive filters out there so I'm wondering if the higher dollar (better quility) filters do not have this problem. I've bought some individual filters that cost more and haven't had this problem attached to the lenses, or could it be the step down rings. To date the only filter I've used with the rings is a filter out of the kit, the polerizing filter to be exact. Any help with this problem will be greatly appreciated.

Royce