Eli5 why do people say to wash dishes or your hands in warm water when cold slows down bacteria growth?
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It might be so that your hands are less likely to chap afterwards, as tiny little openings in your skin can be caused by rinsing under too-cold water (during colder seasons) or not rinsing for long enough (from unpleasant cold water, which can cause irritating soap to linger on your skin.)
It might be so that your hands are less likely to chap afterwards, as tiny little openings in your skin can be caused by rinsing under too-cold water (during colder seasons) or not rinsing for long enough (from unpleasant cold water, which can cause irritating soap to linger on your skin.)
You don’t use hot water to kill bacteria when you wash your hands. You’d have to use water so hot (>155F) and keep it there for at least 15 seconds to kill 99.5% of the bacteria present. That would definitely burn your hangs very badly. It’s the SOAP that reduces the surface tension on your hands so dirt and excess bacteria slide off your hands and get rinsed down the drain. Even after washing, you will still have some bacteria left. In fact you’re covered inside and out with bacteria all the time. Hand washing minimizes passing or infecting yourself.
You don’t use hot water to kill bacteria when you wash your hands. You’d have to use water so hot (>155F) and keep it there for at least 15 seconds to kill 99.5% of the bacteria present. That would definitely burn your hangs very badly. It’s the SOAP that reduces the surface tension on your hands so dirt and excess bacteria slide off your hands and get rinsed down the drain. Even after washing, you will still have some bacteria left. In fact you’re covered inside and out with bacteria all the time. Hand washing minimizes passing or infecting yourself.
You don’t use hot water to kill bacteria when you wash your hands. You’d have to use water so hot (>155F) and keep it there for at least 15 seconds to kill 99.5% of the bacteria present. That would definitely burn your hangs very badly. It’s the SOAP that reduces the surface tension on your hands so dirt and excess bacteria slide off your hands and get rinsed down the drain. Even after washing, you will still have some bacteria left. In fact you’re covered inside and out with bacteria all the time. Hand washing minimizes passing or infecting yourself.
Warm/hot water is better for removing oils and grease which is the primary mechanism of soap. Removing the oil on the skin removes the bacteria that is stuck to its surface.
Warm/hot water is better for removing oils and grease which is the primary mechanism of soap. Removing the oil on the skin removes the bacteria that is stuck to its surface.
Warm/hot water is better for removing oils and grease which is the primary mechanism of soap. Removing the oil on the skin removes the bacteria that is stuck to its surface.
It’s a physics assist as opposed to a germicidal assist; friction does the cleaning, and water that loosens stuff up (warm) is better.
It’s a physics assist as opposed to a germicidal assist; friction does the cleaning, and water that loosens stuff up (warm) is better.
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