Eli5 why do people say to wash dishes or your hands in warm water when cold slows down bacteria growth?
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In terms of washing greases/fats off dishes, look up ‘micelles’. These are what the surfactant in the washing up liquid creates around the fats in order to solubilise them in water and clean them off. The rate of micelle formation increases as a function of temperature, so hot water is better.
This is an extreme case, but when performing radiological decontamination on people we were trained to avoid extreme temperatures when cleaning skin with water. Too cold closed skin pores which could trap particles, and too hot would enhance their adsorption into the bloodstream.
Your typical dirt and grime probably aren’t affected at the scale where this is a problem, but all the same.
I wash with cold (whatever doesn’t go in dishwasher) – waste of energy using warm water ie. gas to heat up warm water when just going down the drain.
I wash with cold (whatever doesn’t go in dishwasher) – waste of energy using warm water ie. gas to heat up warm water when just going down the drain.
This is an extreme case, but when performing radiological decontamination on people we were trained to avoid extreme temperatures when cleaning skin with water. Too cold closed skin pores which could trap particles, and too hot would enhance their adsorption into the bloodstream.
Your typical dirt and grime probably aren’t affected at the scale where this is a problem, but all the same.
This is an extreme case, but when performing radiological decontamination on people we were trained to avoid extreme temperatures when cleaning skin with water. Too cold closed skin pores which could trap particles, and too hot would enhance their adsorption into the bloodstream.
Your typical dirt and grime probably aren’t affected at the scale where this is a problem, but all the same.
It helps to remove food residue. Dunno the science behind it, but it’s effective.
guess theory: things become more “dense” when cold. Like, butter! The more its heated, the easier is is to use. I presume its something like that. Solid to liquidity deal. Probably has to do with states of matter and chemistry.
It helps to remove food residue. Dunno the science behind it, but it’s effective.
guess theory: things become more “dense” when cold. Like, butter! The more its heated, the easier is is to use. I presume its something like that. Solid to liquidity deal. Probably has to do with states of matter and chemistry.
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 helps to remove food residue. Dunno the science behind it, but it’s effective.
guess theory: things become more “dense” when cold. Like, butter! The more its heated, the easier is is to use. I presume its something like that. Solid to liquidity deal. Probably has to do with states of matter and chemistry.
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