Like the title says. My favorite old Q-Pad 5K laser gaming mouse is jerky most of times when I move the cursor on the screen, it suddenly gets stuck??? I've vacuumed it, blown it and most other things I can think of. But when I flip the mousepad upside-down, and put the mouse on that side, it works flawlessly??? Can somebody here shed some light on this? (I'm sorry for seeming so frustrated, but it really is quite frustrating ).