The hotter the water the more germs killed tends to be how many of us think of cleaning, particularly when it comes to washing up dishes .

That was certainly the theory when I was working at a pizza shop and instructed to use the hottest water possible for washing pan lids, leaving the skin on my hands red and irritated (even while wearing gloves).

It turns out that's not exactly the case, and not only is the hottest water temperature not necessary, a microbiologist has revealed it doesn't need to be warm at all.

While hot water is brilliant for washing up, it shouldn't be at such a temperature that you can't do the task properly.

"You don't want to burn your hands or use water so uncomfortably hot that it makes you rush and do a shoddy job," Bill Sullivan, PhD , Sho

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