Damage to the Brush and Dishwasher
Putting a toilet brush in the dishwasher can also cause physical damage. The bristles may become warped or fall out, making the brush less effective. Hard parts of the brush might also scratch or damage the dishwasher’s interior, leading to expensive repairs.

Better Ways to Sanitize a Toilet Brush
There are safer, more effective methods for disinfecting toilet brushes using household products that specifically target the germs found in bathrooms.
- Bleach: Fill a bucket with hot water and add a cup of bleach. Soak the brush for at least an hour, rinse thoroughly with hot water, and let it air dry. This method kills most bacteria and is widely recommended.
- Hydrogen Peroxide: Pour hydrogen peroxide over the bristles, let it sit for about 10 minutes, then rinse with hot water and dry. This is a good alternative if you prefer something less harsh than bleach.
- Vinegar and Baking Soda: Sprinkle baking soda on the bristles and pour white vinegar over them. The mixture will fizz, helping to loosen debris and kill bacteria. After 15 minutes, rinse the brush well and let it dry completely.
Tips for Maintenance and Replacement
After each use, rinse the brush with hot water to remove residue and store it in a holder that allows airflow, which helps it dry and prevents bacterial buildup. Make it a habit to disinfect the brush regularly using one of the methods above.
Even with good care, toilet brushes should be replaced periodically. If the bristles are fraying, there’s a lingering smell, or mold is visible, it’s time for a new one. As a general guideline, replace your toilet brush every 6 to 12 months.

In Summary
Though it might seem like a time-saver, using a dishwasher to clean toilet brushes is not recommended due to the risk of contamination, ineffective sanitation, and potential damage to your appliance. Stick with targeted cleaning methods to ensure your toilet brush remains hygienic and your bathroom stays healthy. Regular cleaning and timely replacement are the best ways to maintain both cleanliness and peace of mind.