I just bought two guitars, used. One of them the Whammy Bar is so loose that it just falls out of reach. I took apart the guitar and an E-clip is holding it on. Is there a way to tighten the mechanism so that the bar stays where you want it? And on the other guitar if you're in the middle of a song and not playing, it makes the noise as if you're strumming but missing notes. The game sees it as you missing notes and because of this your score starts to drop. What could cause this?