How should I clean a sponge or dish brush used around food?

Start with the sponge’s label or manufacturer directions; not every sponge is suitable for every cleaning method. For a sponge labeled as suitable for sanitizing, UMN Extension recommends sanitizing it daily, letting it air-dry between uses, and replacing it every 1–2 weeks or sooner if it is worn. [S1]

A practical routine is to let the sponge air-dry between uses, then sanitize it daily using a method the manufacturer permits. Air-drying is part of the recommended care, but it does not replace sanitizing.

UMN Extension lists a dishwasher sanitize/heated-dry cycle, a sanitizer solution used for its required contact time, or microwave heating—but only if the sponge’s label says it is microwave-safe and it contains no metal. For the microwave option, the guidance says to rinse and saturate the sponge first. Follow the item’s instructions, including any limits on heat or sanitizer use. [S1]

Don’t assume a sponge is microwave-safe based on its appearance. If the label is missing or unclear, choose a method the manufacturer explicitly permits rather than guessing. If using a sanitizer solution, follow that product’s directions for the required contact time; the guidance does not specify a universal solution or concentration.

Yes. UMN Extension recommends cleaning and sanitizing a dish brush after each use, using a dishwasher sanitizer cycle or a sanitizer solution according to its required contact time. Check the brush’s manufacturer directions before using heat or a chemical sanitizer. [S1]

Sanitizing should not be treated as a guarantee against cross-contamination. USDA FSIS cautions that microwaving or boiling a kitchen sponge may reduce some bacteria, but those methods alone do not ensure the sponge will prevent potential cross-contamination. USDA also recommends buying new sponges frequently if you use them. Its guidance here is about sponges, not brush care. [S2]

Copy and adapt this routine:

1. Check the sponge or brush label before choosing a cleaning method.
2. Let a sponge air-dry between uses. [S1]
3. Sanitize a suitable sponge daily using a label-approved option. [S1]
4. Use a microwave only when the sponge is labeled microwave-safe and contains no metal; rinse and saturate it first. [S1]
5. Clean and sanitize a brush after each use as directed. [S1]
6. Replace a sponge every 1–2 weeks, or sooner if worn. [S1]
7. Treat sanitizing as a care step, not proof that cross-contamination is impossible. [S2]

Example: If a sponge label permits a dishwasher sanitize cycle, you could use that cycle daily, air-dry the sponge between uses, and note a replacement date one to two weeks ahead. That schedule follows the cited guidance, but does not promise that a sponge remains suitable for a particular length of time.