Clean the filter and drain basket regularly to remove food debris.
- Run a vinegar and baking soda cycle monthly to eliminate odors.
- Keep the door ajar after cycles to prevent moisture buildup.
- Call a pro if smells persist after deep cleaning or if you notice leaks or errors.
Why does my dishwasher smell?
Food particles and grease accumulate in the filter, drain, and door gasket. These decompose and produce odors. Standing water in the sump or drain hose can also become stagnant. Hard water minerals can trap bacteria. A clogged air gap or vent restricts airflow, worsening smells. Detergent residue and biofilm on interior surfaces contribute too.
How to fix a smelly dishwasher step by step
Start by removing and cleaning the filter under the bottom spray arm. Rinse it under hot water and scrub with a soft brush. Check the drain basket for debris and clear any blockages. Wipe the door gasket and edges with a damp cloth and mild soap. Run a hot water cycle with a cup of white vinegar placed upright on the top rack. After it finishes, sprinkle one cup of baking soda on the bottom and run a short hot cycle. Finally, clean the spray arms by removing them and rinsing out any clogged holes.
How to prevent dishwasher smells in the future
Scrape food scraps off dishes before loading, but no need to pre-rinse. Run the dishwasher at least every few days to prevent stagnant water. Leave the door slightly ajar after a cycle to let moisture escape. Clean the filter monthly and the gasket weekly. Use a dishwasher cleaner or vinegar monthly. Check the drain hose for kinks and ensure proper installation. Run the garbage disposal before starting the dishwasher to prevent backup.
When should I replace my dishwasher or call a pro?
If you've cleaned the filter, gasket, and run vinegar cycles but the smell persists, check for a clogged drain hose or air gap. A persistent musty odor might indicate mold inside the walls or insulation. If water pools at the bottom after a cycle, the drain pump may be failing. Strange noises or error codes suggest a mechanical issue. If the dishwasher is over ten years old and repairs cost more than half of a new unit, consider replacing it. Call a professional if you suspect electrical or plumbing problems.