The air blades are really gross hand dryers to use. The first time I saw one was in a bar/restaurant or pool hall, forget which, but I gave it a shot and accidently touched the edge of the dryer which was wet. I stopped, washed my hands again, and dried it with those cheap chemical smelling brown paper towels which leave your hands feeling like there is a film of leftover hand towel chemicals. That was more preferable to the disgusting air blade. Never used an air blade again. And to top it off, they are always wet and covered in dried drippings of lord knows what.

The best hand dryers are those high velocity designs where you put your hand under the blast and dry them in seconds.