They are a BIG pain to get off without braking the tabs. Most of the time atleast one will make that nice pop noise we all love. It is Very common to have them go out. At work the easiest and cheapest way in the long run is to replace it. BUT, somewhere on this site is a link to fixing them and I would really like someone to post it cuz I have a friend that needs his fixed and hes a tight azz. So if you know where that link is put her up please.