Handwashing is the most effective way to remove bacteria with which we come into contact continuously. It turns out, however, that the sanitizing effect is lost almost instantaneously when we use a hand dryer , especially in public places, especially when it works with a powerful and hot air jet.
A study by a team at Connecticut University, USA, shows that public hand dryers are some sort of bacterial bombs, firing large quantities of germs to our hands with every use. These are not always dangerous or pathogenic microorganisms , but the risk of getting them on our cleaned hands is a fact.
Putting an automatic hairdryer and hands in public places is becoming more and more widely used as an effective, environmentally friendly tool to reduce paper use and reduce the amount of waste products. It turns out, however, that with regard to the hygienizing effect , hand-brushes seriously relinquish the retro-drying methods of hand drying.
Data from American scientists is collected by directly tracking the presence of bacteria in various public places in the United States. It has been found that the damp environment, the hot air from the hand brushcutters and its powerful jet predetermines the vigorous growth of bacterial colonies across the surface of the device and their easy spreading over long distances. Every time a hand is touched with these devices, there is a risk of carrying large amounts of bacteria on them.
The researchers conclude that hand dryers are among the biggest sources of bacterial contamination in public places.
More specific consideration of the information gathered helps to uncover the most polluting and hygienic ways to dry hands in public places. The data shows that people using multi-jet hands-free handheld handheld pumps have about 5 times more bacteria on their hands than people who use hot-air dryers. The cleanest leaves the hands of the people who dry them with paper wipes – the bacteria left on the hands in this case are about 30 times less than after using automatic hand dryers.
The study proves that hand washing remains the most effective hygiene method, but the effect of it depends to a great extent on the way we dry it.