my magic mouse playing please

Jul 6, 2013
i use a magic mouse with my macbook air, lately i have noticed that the tracking on my mouse has become very laggy to say the least, i originally put it down to the state of my desk which has a lot of scratches grooves and dents due to using as a cutting table, that said i recently bought an Alupad from Just Mobile, when i try the mouse with the mousepad i get nothing at all that is to say when i move the mouse on the mousepad nothing is translated onscreen only the two finger scrolling gestures.
Strangely enough though whilst the mousepad is in the cellophane wrapper it was delivered in the mouse works perfectly.
help me out someone please.