Cellulose sponge
The most-handled cleaning tool in a kitchen and the one that holds the most moisture and food. Cleaning it is possible; the evidence stops short of eliminating what is in it.
Precautions
- Check the manufacturer's instructions
In detail
A cellulose sponge cleans by holding a large volume of detergent solution in an open structure and delivering it under light pressure, which is why it outperforms a cloth on a plate and why it is difficult to keep clean itself. The same structure holds moisture, food residue and warmth, which is a growth medium. A university extension service's fact sheet gives three methods for a traditional cellulose sponge: microwave it wet on high for one minute, with an explicit exclusion for any sponge containing metal; soak it in a dilute bleach solution for one minute; or run it through a complete dishwasher cycle on high heat. It advises cleaning weekly and replacing the sponge when it is torn or discoloured. The limit is more useful than the methods, and it is stated plainly: the fact sheet does not claim any of them eliminates bacteria. They are presented as ways to clean the sponge, with the modest conclusion that regular cleaning or replacement helps prevent spread. A sponge used on raw meat surfaces and then on a worktop is doing the opposite of cleaning, and no treatment of the sponge changes that sequence.
Sources for this page
Sources
Kitchen Hygiene: Let's Talk About That Sponge!
Clemson University Cooperative Extension, Home & Garden Information Center · Credible secondary source
Relied on for: That the three named methods are microwaving a wet sponge for one minute with metal-containing sponges excluded, a one-minute bleach soak, or a complete dishwasher cycle; that weekly cleaning and replacement when worn are advised; and that no elimination of bacteria is claimed. (states this directly)
Verification: a person has read the passage relied on.
Read on — The list of methods for cleaning a traditional cellulose sponge, and the replacement advice. Supports a narrower statement — our claim was reduced. CleaningHQ had expected a source of this kind to say that microwaving disinfects a sponge, because that is how the practice is described everywhere else. It does not. The catalogue therefore records the methods with the modest claim the source actually makes — cleaning, and helping prevent spread — and treats sponge disinfection as not established rather than as supported.
Last reviewed by a person on .