document: Hands-free faucet not so clean Hands-free electronic faucets have widely been assumed to help fight the spread of germs . But a team at Johns Hopkins Hospital in Baltimore has discovered that at their facility , electronic faucets were more likely to be contaminated with Legionella bacteria than the manual type , possibly because the electronic faucets have a complicated system of valves that is difficult to clean . The study will be presented at the annual meeting of the Society for Health Care Epidemiology .
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