I have a Gigabyte M7 Force mouse and a Steelseries QCK mouse-pad. It had been working fine for a long time, but recently it has started playing up. For example, the mouse moves smoothly across the pad but the cursor stutters, moves very slowly and sometimes doesn't even move. When I remove the mouse-pad and use the mouse on my desk, it works perfectly fine. Any suggestions as to why this is happening, because I really dislike using my mouse on the desk.