What did break in it? I'm using sculpt since it was released and the mouse is still alive. But I can't say that about the USB receiver, it broke after 6 months

What did break in it? I'm using sculpt since it was released and the mouse is still alive. But I can't say that about the USB receiver, it broke after 6 months (it stopped receiving anything frombmouse/keyboard and the plastic cover just broke). The replacement keyboard has almost the same issue with the receiver (loses contact depending ontthe way it is inserted), so I put it in an USB hub so I won't need to touch it and break the contacts. Besides that I love it, and I love that the useless numpad is not the part of keyboard (BTW.I why every 15 inch laptop keyboard is has those is beyond me), I store it in a drawer.