Researchers at the University of Florida found that microwaving a kitchen sponge for two minutes killed 99 percent of all living germs and bacterial spores in sponges and pads, including E. coli, in about a minute.
University of Florida engineers Gabriel Bitton: “A dishwasher will not remove completely the microbes, unless you use chlorine and chlorine smells. So I think the best way to do it is simply wet your sponge, don’t do it with a dry sponge, wet the sponge, and put it in the microwave for about two minutes and the sponge will be sterilized.”
The engineers recommend:
– ensure the sponge is completely wet
– two minutes of microwaving is sufficient for most sterilization
– sponges should also have no metallic content
– be careful when removing the sponge from the microwave, as it will be hot.
(via University of Florida)