Magic Mouse not tracking properly
Only within the last few days, I noticed that my Magic Mouse was not tracking properly. If I move the mouse up and down the entire length of my mouse pad, the cursor moves only about an inch or two on the screen. I have changed the tracking speed from slowest to fastest; I have turned off the mouse and the bluetooth inn very possible combination; I have changed to fresh batteries (even though System Preferences says 88% battery life). It works better going horizontally, but vertically, it just doesn't track right. My MacBook Air's trackpad works fine.
MacBook Air, OS X Yosemite (10.10.2)