How to Eliminate Bad Smells from Your Dishwasher
Quick answer
To eliminate bad smells from your dishwasher, clean the filter and interior with vinegar or baking soda, and ensure proper drainage. Regular maintenance prevents odors.
Confirm the symptom
- Notice a foul odor coming from the dishwasher
- Smell lingering after a wash cycle
- Dishes have a musty or moldy scent
Tools and prep
- White vinegar — Natural disinfectant
- Baking soda — Absorbs odors
- Microfiber cloth — Cleans surfaces effectively
- Dishwasher filter — Removes trapped debris
- Rubber gloves — Protects hands during cleaning
Disclosure: We may earn a commission from qualifying purchases via affiliate links. Learn more.
Prep & safety
- Wear rubber gloves to protect your hands while cleaning.
- Ensure the dishwasher is empty and unplugged for safety.
Step-by-step troubleshooting
Clean the Filter
Do: Locate and remove the filter at the bottom of the dishwasher. Rinse it under running water to remove debris.
Observe: Filter is free of food particles and visible dirt.
Means: Filter is clean and ready to reinstall.
Next: Clean the interior with vinegar.
Clean the Interior with Vinegar
Do: Place a cup of white vinegar in a dishwasher-safe container on the top rack. Run a hot water cycle without dishes.
Observe: Vinegar neutralizes odors and dissolves buildup.
Means: Interior is sanitized and deodorized.
Next: Use baking soda for additional odor removal.
Use Baking Soda
Do: Sprinkle a cup of baking soda on the bottom of the dishwasher. Run another hot water cycle.
Observe: Baking soda absorbs lingering odors and cleans surfaces.
Means: Interior is fresh and clean.
Next: Wipe down the door and seals.
Wipe Down the Door and Seals
Do: Use a microfiber cloth dampened with water and vinegar to wipe the door gasket and interior surfaces.
Observe: No visible mold or mildew, and surfaces are clean.
Means: Potential odor sources are removed.
Next: Check for proper drainage.
Check for Proper Drainage
Do: Ensure the drain hose is not clogged and the air gap (if present) is clear.
Observe: Water drains freely without backup.
Means: No standing water to cause odors.
Next: Test the dishwasher with a load of dishes.
Test the Dishwasher
Do: Run a normal cycle with a load of dishes to ensure the odor is gone.
Observe: No foul smell during or after the cycle.
Means: Dishwasher is functioning properly and odor-free.
Next: Complete
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Food particles trapped in the filter | Decomposing food causes foul odors. | High | Low | Dishwasher filter |
| Mold or mildew in the gasket or interior | Moisture buildup promotes mold growth. | Medium | Low | None |
| Clogged drain hose or air gap | Standing water leads to bacterial growth. | Medium | Medium | None |
| Hard water buildup | Mineral deposits trap odors and bacteria. | Low | Medium | Descaler |
| Improper use of detergent | Excess detergent can leave residue and cause odors. | Low | Low | None |
| Old or expired dishwasher tablets | Ineffective cleaning leads to residue and odors. | Low | Low | None |
Parts matching
If replacement parts are needed, match these specifications:
- Dishwasher filter: model number and size from the old filter
- Descaler: compatible with your dishwasher model
- Microfiber cloth: lint-free for cleaning surfaces
Check the dishwasher's user manual for specific part numbers and compatibility.
Disclosure: We may earn a commission from qualifying purchases via affiliate links. Learn more.
When to call a pro
- Persistent foul odors after multiple cleanings
- Visible mold or mildew that won't clean
- Clogged drain hose that cannot be cleared manually
- Dishwasher leaks or doesn't drain properly
- Unusual noises during operation
- Error codes indicating internal issues
FAQ
How often should I clean my dishwasher to prevent odors?
Clean the filter and interior monthly, and run a vinegar or baking soda cycle every few months.
Can I use bleach to clean my dishwasher?
Avoid bleach as it can damage rubber seals and leave harsh chemical odors. Use vinegar or baking soda instead.
Why does my dishwasher smell like rotten eggs?
A rotten egg smell is often caused by bacterial growth in the drain hose or air gap. Clean these areas thoroughly.
What if the odor returns after cleaning?
Check for hidden mold in the gasket or filter, and ensure the drain is clear. If the problem persists, consult a professional.