Does Cold or Hot Water Kill Germs
Does Cold or Hot Water Kill Germsにまつわる興味深い視点を詳しく紐解きます。
Don’t ice out cold water just yet—it has a few tricks up its sleeve. Running a cut under cold water can actually help reduce swelling and slow down bacterial growth at the site of a wound. It’s not killing the germs, but it’s buying your immune system precious time.
For everyday handwashing, the temperature doesn’t matter as much as the friction and duration. A 2017 study out of Rutgers University found that washing with 60°F water removed just as many germs as 100°F water, as long as you lather with soap for 20 seconds. So, go ahead and sing “Happy Birthday” in any thermal conditions you like.
Cold water is also a legend in the laundry room. Modern detergents are formulated to work in chilly washes, saving energy and protecting your favorite cashmere sweater. Just remember: for heavily soiled items like gym socks or dish towels, hot water still helps dissolve grime.
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