Put it in the fridge for a while then try again with a dishcloth over the filter...
I've heard of doing it this way before & it has worked....happened to me a couple of weeks ago when I was using a reversing ring - I put it out in the hallway in the cold for a while and she came off easily.
EDIT - assume it's best to remove the lens from the body and just put that in the fridge ?
Daniel.
EDIT - assume it's best to remove the lens from the body and just put that in the fridge ?
Daniel.
Rubber gloves.