Many people love the convenience of those button-less hand dryers that let you dry your hands without having to touch anything. Hypothetically, they seem extremely hygienic because you don’t have to touch the apparatus in order to get your hands dry. But several studies have proven that the exact opposite is true — squeamish bathroom users may want to be wary before reading ahead.
Restroom hand dryers are covering everything with waste. A microbial study by the University of Connecticut found that hand dryers in public restrooms were infested with infectious microbes — and every time they are operate, they spray bacteria over everything, including you.
Basically, whenever a toilet is flushed it sends fecal matter particles into the air, which stays airborne until somebody activates a dryer, which sucks the particles in and blows them back, essentially covering your hands with tiny fecal particles.
This isn’t the first time a study life this was done, but notably, it’s the first without funding from biased companies. The study found companies and institutions can combat the spread of airborne fecal bacteria by installing HEPA filters in their devices. So, think about that the next time you go to dry your hands.