What Tim said. Also, if the surface is too shiny, my mouse won't work reliably.Make sure you have good batteries.
Mine has had eratic behavior in the past and it has either been dead cells...
The mouse doesn't track on a pad on a specific part of the table?its slow,,i just moved the mouse to another part of the desk again, and it worked fine. I already cleaned the mouse pad it still does not work, i even cleaned the desk under the pad and tried that, still does not work like it should, like on that other part of the desk where it works fine