I've got a set of 2 AP plastic reels. I find that I cannot load 35mm film any longer onto one of the reels. The other loads the film no problem. What happens is that the film gets stuck going onto the reel a short while after I start to load it, and then it will not load any further. I don't know what the issue is since its dark Any ideas as to what the problem could be with the problematic reel? I've looked at it and cannot see anything obvious...