Just pushing down on the mouse on a hard or soft surface makes the cursor travel down eventually reaching the bottom of the screen, yet the mouse hasn't really moved. This makes it difficult to double click when the cursor is constantly moving by a few pixels. I guess I never noticed this, but I've seen a few others complain about this to no resolve. Is there a fix? Broken sensor? Or badly designed mouse? I was thinking of buying the Corsair Vengeance M95 as a replacement. I've had reliability issues with all my Logitech products, so I need something other than Logitech.