I just read that paper towels reduce bacteria left on hands by 40% – 60% whereas electric hand dryers increase bacteria levels by 255% – yes, that is adding another 2.5 x what you started with.
Electric hand dryers are just a con to save $$$, in fact you will have a lower bacteria count if you wipe your hands on your trousers, or if you don’t want wet trousers, use the next guy’s..