Misbehaving Mouse

So used to a mouse in my hand, I added a small Belkin retractable cord mouse ($10.99) to my exterior keyboard for the MacBook Pro. Good, most of the time.  When it misbehaves and forgets to move the cursor I tried various "remedies."  What works is to merely unplug the little plug from the little connection cord that comes out of the exterior keyboard, and then plug it right back in.