Sorry I don't have a solution. I had the same exact issue before returning it. I looked everywhere for a fix, but it just seems to be a hardware issue. I never had a issue like that with my G602. I was using a G440 mouse pad too, which has a profile in the software to calibrate the mouse to automatically. So, it can't be an issue with the surface I was using because if that one doesn't work I don't know what would.