Toilet brushes are essential for cleaning—but they also collect germs. While some people consider tossing them in the dishwasher, this method is neither safe nor effective.
Why Not the Dishwasher?
Dishwashers are designed for dishes, not bathroom tools. Their jets and heat can’t reliably kill the bacteria found on toilet brushes. The bristles also don’t clean well inside a dishwasher, leaving germs behind.
Cross-Contamination Risks
Placing a brush alongside plates and cups can spread bacteria to utensils that touch food, increasing the chance of illness.
Damage to Brush and Dishwasher
The harsh cycle may bend or loosen bristles, while metal parts can scratch the machine’s interior—leading to costly repairs.
Safer Cleaning Options
Instead of the dishwasher, disinfect your brush using proven methods:
Bleach soak: Mix hot water with one cup of bleach, soak for an hour, rinse, and air-dry.
Hydrogen peroxide: Pour directly on bristles, let sit 10 minutes, rinse, and dry.
Vinegar & baking soda: Sprinkle baking soda, add vinegar, let fizz 15 minutes, rinse, and dry.

Everyday Care
Rinse the brush with hot water after each use, store it in a ventilated holder, and disinfect regularly.
When to Replace
Even with cleaning, brushes wear out. Replace if bristles fray, odors linger, or mold develops—ideally every 6–12 months.
Bottom Line
Washing a toilet brush in the dishwasher isn’t worth the risk. Stick to disinfectants and regular replacements to keep your bathroom truly clean.