[mrb]

Hand dryers are very efficient! They don't seem to do anything for the first ~20 seconds, but in the last 5 seconds you feel all the water evaporating. That's because only the water surface evaporates, until your skin is exposed dry. You are probably like most people who I see use them in public bathroom, using them only for <10 seconds.

[qznc]

Relevant TED talk:

http://www.youtube.com/watch?feature=player_embedded&v=2...

tl;dw: thorougly shake, the wipe with one paper folded once

[mibbitier]

You're probably right. But I can wipe with a towel in 2 seconds. 20 seconds is far too long to be any use.