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the restroom hand dryer likely acts as a reservoir sucking up fecal matter and other bacteria from the local environment and then spewing it onto the user's hands
the user of the dryer will likely have
considerably more bacteria deposited upon his hands then a user of the restroom who did not use a dryer
these dryers are
filthy devices
the link is a study referenced by N.I.H., NCBI., and the N.L.M.
from the study:
"Within a large building, potentially pathogenic bacteria, including bacterial spores, may travel between rooms, and subsequent bacterial/spore deposition by hand dryers is a possible mechanism for spread of infectious bacteria, including spores of potential pathogens if present.
Indeed, several studies have found that hot-air dryers (here, hand dryers) can disperse bacteria from hands and contaminate the surrounding area . However, it is also possible that forced air from hand dryers deposits environmental bacteria on well-washed hands. Indeed, a recent report suggested that hand dryers could deposit both pathogenic and nonpathogenic bacteria on the hands and bodies of users."
I'm not suggesting that a person not wash his hands. I'm suggesting he dry them with paper, of if none is available, just leave them to dry naturally, which should take about 30 seconds
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5881072/
