I’ve been frustrated for several weeks (months?) over a neutral density lens filter on one of my Canon lenses. It was stuck, and I really mean stuck! I haven’t a clue how it got welded to the lens, but I simply didn’t have the strength to twist it off to clean a spot on the inside.
I hit the internet. I wanted a free solution. Some good ideas at this link.
I pulled out an old mouse pad, flipped it over so the really rubber side was face up. Placed my lens flat on top of it with even pressure—that’s the key, and twisted while pressing down. Keeping the mouse pad from bunching up occupied my other hand.
Tah Dah! It came off!
It’s the simple things in life.