I have now gone thru three Evoluent vertical mice. Every single one of them eventually developed this weird behavior where the wheel input is “not stable”. Example, you are gently wheeling it one detent at a time to scroll a page, then the page jumps back up or down half a page or more. I have not been able to find a consistent case one way or another. Sometimes it works fine for some time, then starts doing this – it is super frustrating. I have to fly my pointer over to the scroll bar handle on a window (I make those show at all times contrary to some UI preferences) and click/hold that to be able to gently drag the page up and down without this annoying unstable wheeling behavior. Any ideas what is going on?