For years and years, there were the high powered air cannons that dried off your hands after washing in the bathroom. This was a step up from the olden days of a paper towel dispenser. As paper towel dispensers evolved so did air hand dryers. A scientist from California did a study of the air hand dryers in a bathroom and the results were stunning! She posted a picture of the petri dish she had used as part of the study and it received over half a million shares on Facebook!
Unbelievably gross and this is particularly why I prefer paper towels, every time.
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