How to Clean Scrub Brushes | Remove Grime And Smell

Clean scrub brushes by removing trapped debris, washing bristles in warm soapy water, rinsing thoroughly, and air-drying bristle-side down.

A scrub brush that smells musty or leaves grit behind isn’t doing its job. The fix is a quick rinse-and-soak routine that takes about ten minutes with supplies you already own. The steps below work for most kitchen, bathroom, and utility brushes — and knowing how to dry them matters just as much as washing them.

The Five-Minute Deep Clean Routine

Every scrub brush needs the same basic treatment: remove what’s stuck, wash what’s left, and dry it properly. Here’s the sequence that clears both grime and odor.

Step 1: Pull Out Trapped Debris

Flick the bristles against the sink edge or run the brush under warm water to dislodge hair, food, and soap scum. A toothpick or the tip of a butter knife works for anything wedged deep between bristle rows. Skipping this step lets debris trap water and breed bacteria later.

Step 2: Soak In Warm, Soapy Water

Fill a bowl or sink basin with warm water and a few squirts of dish soap. Dish soap cuts grease better than hand soap and rinses clean without residue. O-Cedar’s official care guide recommends soaking the brush in soapy water while you clean the rest of the room — ten minutes is plenty for heavily soiled brushes.

Step 3: Scrub The Bristles Themselves

Work your fingers through the bristles under running water, pressing soap through the base where grime collects. If the brush has a built-in scraper edge or a handle groove, give those a wipe too. For tough buildup, a second brush or an old toothbrush can work the bristles clean, but fingers usually do the job.

Step 4: Rinse Thoroughly And Shake Out

Rinse under warm running water until the water runs clear and no suds remain. Give the brush a firm shake to fling excess water from the bristle base. Soap trapped at the base leaves a film that collects dust and dulls the brush’s scrubbing power.

Step 5: Dry Bristle-Side Down

Set the brush on its handle with bristles pointing down, or lay it flat on a dish towel. Standing a brush bristle-side up traps water in the ferrule, the metal or plastic collar where bristles meet the handle — that trapped moisture is what causes rust and mildew. A fully dry brush is ready for the next sink.

How To Disinfect A Scrub Brush Safely

When a brush has handled raw meat juices or visible mold, a soap-and-water wash isn’t enough — you need a disinfectant with a real contact time. Two household options work well, but material compatibility matters more than most advice articles admit.

Hydrogen peroxide (3% solution, the brown bottle from the drugstore) is the gentler choice. Pour it over the bristles and let it sit for at least five minutes of wet contact time before rinsing — disinfection doesn’t happen instantly, and a shorter soak just wets the brush. This works on plastic and nylon bristles without bleaching them.

For a stronger disinfectant, mix one part bleach with nine parts water and soak the bristles for up to ten minutes. Bleach is harsher: it can discolor nylon bristles and corrode metal ferrules, so rinse immediately and thoroughly. Natural-bristle brushes (boar or other animal hair) should never touch bleach — stick to soap and water for those, since bleach breaks down the bristles themselves.

Whatever disinfectant you choose, follow its label instructions for contact time, and rinse the brush completely afterward. Leftover disinfectant residue transfers to the next surface you scrub.

How Often Should You Clean A Scrub Brush?

Kitchen scrub brushes deserve a deep clean after every few uses, or immediately after contact with raw meat juices. Bathroom brushes can go longer — a quick rinse and air-dry after each use, with a full soap-and-water clean weekly. A brush that lives in a draining caddy stays cleaner between washes than one left sitting in a damp sink.

Replace a scrub brush when bristles bend permanently, shed, or feel limp. A tired brush spreads bacteria instead of removing it — usually after about three to six months of regular use.

If you’re shopping for a replacement that holds up better, our tested roundup of the best bathroom scrub brushes covers which handles and bristle materials actually last.

FAQs

Can I put a scrub brush in the dishwasher?

Plastic scrub brushes usually survive a dishwasher’s top rack, but the heat can warp nylon bristles over time and melt glue holding wooden handles. Wooden brushes should always be washed by hand. If you try the dishwasher, place the brush bristle-side down in the utensil basket and skip the heated dry cycle.

Why does my scrub brush smell even after washing?

The smell comes from bacteria breeding in moisture trapped at the bristle base. Washing with dish soap removes surface grime, but if the brush stays wet, the odor returns quickly.

What’s the best way to dry a scrub brush?

Air-dry the brush bristle-side down so water drains away from the handle and ferrule. A dish rack, a cup on its side, or a dedicated brush holder with drainage all work. Avoid drying brushes on a towel laid flat, since the bristles stay damp against the fabric for hours.