Help! I can't seem to unscrew a marumi 40.5mm CPL filter from the 14-42 zuiko micro 4/3 zoom lens. It's been stuck there for several months now and I'd really like the extra light coming back in! The problem is exacerbated by the rotating zoom and the CPL spinning. I was wondering if there is any trick, like using temperature, to separate the two. Otherwise I'll have to stick it in a vice.