Originally Posted by merlinextraligh
...make sure your wrist isn't cocked, that traps the nerve and adds to numbness, keep your wrist so your hand extends straight from your arm
+1 I was going to say the same thing. This works for me pretty well. Basically when you're on the hoods (which is where I like to be most of the time) rotate each hand around the hood, away from the center, so that, like he says, there is no bend at the wrist. It feels strange but it seems to get rid of the tingling/numbness.