I've been using this Mouse for years without any problem, it's clean, and the lenses are clean and dust free, but suddenly without any warning, it stopped pointing. I thought it was not working but after a while I realised that it will scroll and all the gestures work but it won't point. I've checked on the interwebs and only found normal solutions that do not pertain to this problem. The only thing I could put this down to are dirty lenses but they aren't. Could it be that the electronics that control the infra red sensors have failed? Or could it be something really simple that I've missed. Needless to say it has new batteries and is pairing fine.