1. Kitchen Faucet
That metal aeration screen at the end of the faucet is a total germ magnet.Running water keeps the screen moist, an ideal condition for bacteria growth. Because tap water is far from sterile, if you accidentally touch the screen with dirty fingers or food, bacteria can grow on the faucet, explains microbiologist Kelly Reynolds, PhD, an associate professor of community environment and policy at the University of Arizona College of Public Health. Over time, bacteria build up and form a wall of pathogens called biofilm that sticks to the screen. "Eventually, that biofilm may even be big enough to break off and get onto your food or dishes," she notes.
Keep It Clean: Once a week, remove the screen and soak it in a diluted bleach solution--follow the directions on the label. Replace the screen, and let the water run a few minutes
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