I don't regularly take apart and clean my bolts, so I really can't give you any specific advice on this subject. However,if it were me, I would take close attention to what is happening the next time it occurs. Maybe even take pictures. There are alot of very knowledgeable people around here that should be able to give you some sound advice on the problem. Many times it is a matter of them needing a little more info. to help you figure it out. In the mean time, hopefully someone can give you advice on the stuck pins.