logitech MX510

Hey anyone else have this mouse. It has been working great for a long time, but for the last few days its started to get really jerky. defraged, didnt help, reinstalled windows didnt help, my next move is throw it at the wall but seeing i made almost 50 bucks for it, i wanna try to fix it some other way first. If you dont know what the MX510 is, its an precsion optical gaming mouse, used to work great in fps, but the jerkyness meant i had to start using my old MS optical.