I've been cracking since I was a kid. now I am 30 and a few months ago I noticed when I tried to crack my knuckles that they don't crack as often now if at all. before, maybe every 30 mins I could crack all 10 fingers. now I'm lucky if each one will crack once or twice a day and when they do it's a very weak crack unlike before. has anyone had a similar problem? I'm very sad about this and I would like to get my ability to crack back.