Hopefully you just got a dud keyboard. My down arrow key went stiff earlier today and I mashed it a while and it didn't help. Then I blew into the key (from the

Hopefully you just got a dud keyboard. My down arrow key went stiff earlier today and I mashed it a while and it didn't help. Then I blew into the key (from the side) with my mouth (still no compressed air) and that fixed it.