Boiling water can be used to kill all bacteria on sponges

Boiling a sponge in water for several minutes is an effective way to kill *most* bacteria and significantly reduce pathogens, but it does **not** reliably kill *all* bacteria; some heat‑resistant or biofilm‑protected microbes can survive, so the claim that it kills all bacteria is overstated.

Many home and cleaning guides loosely state or imply that boiling water “kills germs” or that bacteria “can’t survive in high temperatures,” giving the impression of complete elimination, but more detailed reporting and microbiology-informed sources note that boiling and other household sanitizing methods kill the majority of bacteria and pathogens, not absolutely all forms, especially those protected in biofilms or more heat-resistant strains.

Boiling water can be used to kill all bacteria on sponges

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