So, over the years I have returned many, many mice under warranty because of the left button going bad. Generally this meant it would start to double-click when it wasn't supposed to, but sometimes it wouldn't actuate at all. My current mouse just started doing this and Logitech recommended cleaning the mouse and making sure there is no debris under the plastic piece you actually press on. I was able to pry it up with a thin blade and blew air in there and it started working fine again... I cleaned and lubed my mouse... lol Weiterlesen...