The Explorer Touch Mouse I got in early September has kaput! Didn't even last four months. I have emailed firstname.lastname@example.org. Let's see what they will do to fix this.
From experience, the mouse must be the most fragile equipment of a PC system. I have lost count how many mice I have worked through. This is the first time I am trying to enforce the warranty. Previously I had just gone ahead to buy a new mouse, attributing the problem to bad luck, too much hassle and I need a mouse now.
I hope the Arc Touch Mouse stands out better. So far so good.