I've got ear piercings with jewelry that are shaped kind of strange, I dunno what they'd be called but they look like []=[] with the small part being the part that goes through the ears, one of the big ends fixed, and the other end threads on. Anyway, they're stuck. Like, I cannot for the life of me get them unscrewed to change the jewelry or give them a good cleaning. This hasn't raised any problems so far, but when it comes the time to size up or just give them a good cleaning, it will. What should/do I need to do to get them to come off?