I chance upon this article by researchers from the University of Leeds (England) that hand dryers in toilets are far from clean.
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What the hand dryer does its blowing bacteria from one’s hands and spread the bacteria into the air. An experiment was conducted paper towels vs air dryers.
A shocking result that, hand dryers actually spread up to 27 times the amount of bacteria in the toilet compared to paper towels.
Air dryers are everywhere in Singapore, I wonder if there is a regulation or any studies done by the HSA on public toilet safety standards.