How to Clean a Kitchen Sponge and Dish Brush — Toronto Home Guide

Kitchen sponges are one of the most bacteria-dense objects in the home — a used sponge can harbour billions of bacteria in its porous structure. Regular sanitizing extends a sponge's usable life and prevents cross-contamination when washing dishes.

Sanitizing a Sponge — Microwave Method

1. Wet the sponge thoroughly — a dry sponge in the microwave is a fire risk
2. Place on a microwave-safe plate and microwave on high for 2 minutes
3. Let sit in the microwave for 1 minute before removing — the sponge will be very hot
4. Allow to cool before using

This method kills the vast majority of bacteria in the sponge. Do not microwave sponges with metallic scrubbing pads.

Sanitizing a Sponge — Bleach Soak

1. Mix 1 tablespoon of bleach in 1 litre of water
2. Submerge the sponge and let soak for 5 minutes
3. Rinse thoroughly and squeeze out all liquid
4. Allow to dry before using

When to Replace a Sponge

Replace kitchen sponges every 1–2 weeks regardless of sanitizing. Signs it's time to replace:

• Persistent odour even after sanitizing
• Visible disintegration or falling apart
• Used to clean raw meat or poultry

Dish Brush Cleaning

Dish brushes are more hygienic than sponges because they dry faster between uses and don't trap moisture in a dense matrix:

1. Rinse thoroughly after every use and shake out excess water
2. Store in an upright position or hang to allow complete drying
3. Soak in a diluted bleach solution (same ratio as above) weekly for 5 minutes, rinse, and dry
4. Replace every 1–2 months or when bristles are splayed