Sometime last year I bought a Logitech Keyboard and Mouse combo-box containing a MK700 keyboard and M705 mouse for our media PC. The keyboard has been great needing new batteries only once. The mouse, on the other hand, became sort of a problem. The screen cursor became as fast as molasses when moving on just about surface, except a magical pillow we have on the couch. It was, needless to say, annoying.
To fix the problem, I first attempted to update the drivers powering the mouse. SetPoint is the customization software that powers the set but it also installs the drivers. After gaining no better performance, I thought it must be a problem with the mouse physically.
I took two cotton swabs, one wet, one dry. I swabbed the optical lens to clean it and then dried it. To my welcome surprise, it worked flawlessly! It worked as it had in the first months on any surface. Apparently this mouse is prone to collecting dust, especially when it’s on a couch, pillows and blankets.