I have a Logitech Performance MX mouse. It's maybe a year old...actually it's 7 months old today as a matter of fact, just looked it up. I have a spot on my computer desk where I've always used the mouse. It seems like it's creating 'dead spots' where the pointer will kind of hesitate on screen and I don't get the precision I'm used to. Works well in other areas of the desk, but not as great and precise as it once did. Plus, I can't get used to having the mouse there. I've cleaned the pads of the mouse, cleaned the desk, put in a brand new fully charged NiMh battery...any other suggestions? I'm also wondering about range. I wanted to plug the tiny usb connector into the back of my tower, which is maybe 3 feet away from the mouse, but it doesn't register well at all...if I plug it into a front usb slot, which is only maybe a foot closer, it works fine.