Is it safe to use a plastic dish sponge in the kitchen?
Not ideal for daily dishwashing. Plastic foam wears down, and damp sponges can hold bacteria.
What to know
The classic yellow and green dish sponge is usually plastic foam with a synthetic scrub layer. It works, but it wears down as you scrub plates, pans, and counters.
Plastic sponge wear matters because worn synthetic cleaning sponges can shed microplastic fibers. Damp sponge storage matters too because used kitchen sponges can carry high bacteria levels.
Use up what you have if it is in good shape. Toss it when it smells, frays, gets slimy, or breaks apart. For daily use, choose plain cellulose, loofah, or a washable cotton or linen cloth.
What the research says
A 2024 Environ Sci Technol study found that abrasive synthetic cleaning sponges released poly(melamine-formaldehyde) microplastic fibers during wear. A 2018 Ital J Food Saf study of used home kitchen sponges found high microbial contamination and several opportunistic or pathogenic bacteria.
The takeaway is practical: less plastic abrasion, faster drying, and frequent replacement.