Just seen some chump dipping his hands in and out of it at great speed. Obviously incorrect usage there, he splattered the cuffs of his shirt with soapy wee water and left with still-wet hands.

It goes without saying that you push your hands right in there as far as they will go, then slowly draw them out and slowly push them back in again, fingers thrust outwards to make your hands as wide as possible.

Ten seconds is enough, if the dryer is used correctly. Even when your hands still feel wet, they are invariably dry, I find.

N’est ce pas?