How to Remove Bad Smell from Dishwasher
Quick answer
To remove bad smells from your dishwasher, clean the filter, rinse aid dispenser, and interior with vinegar or baking soda. Run a hot water cycle to eliminate lingering odors.
Confirm the symptom
- Dishwasher emits a foul odor after cycles
- Smell persists even after cleaning dishes
- Notice a musty or moldy smell inside the appliance
Tools and prep
- White vinegar — Natural deodorizer and disinfectant
- Baking soda — Absorbs odors and cleans surfaces
- Microfiber cloth — Gentle on surfaces and effective for wiping
- Soft-bristled brush — For scrubbing hard-to-reach areas
- 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 from cleaning solutions and debris.
- Ensure the dishwasher is unplugged or turned off to avoid electrical hazards.
Step-by-step troubleshooting
Remove and Clean the Filter
Do: Locate the filter at the bottom of the dishwasher and remove it. Rinse it under running water to remove food particles and debris.
Observe: Filter is visibly clean with no clogs or residue.
Means: Clogged filters can trap food particles and cause odors.
Next: Clean the filter with vinegar or baking soda.
Clean the Filter with Vinegar or Baking Soda
Do: Soak the filter in a solution of equal parts water and white vinegar for 15 minutes, or sprinkle baking soda on it and scrub gently with a soft-bristled brush.
Observe: Filter is free of odors and residue after cleaning.
Means: Vinegar and baking soda neutralize odors and break down grime.
Next: Reinstall the filter and check for any remaining odors.
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 to allow the vinegar to deodorize and clean the interior.
Observe: Interior surfaces are clean and free of lingering odors.
Means: Vinegar evaporates during the cycle, leaving the dishwasher fresh.
Next: Wipe down the interior with a microfiber cloth if needed.
Wipe Down the Interior
Do: Use a microfiber cloth dampened with water and a small amount of baking soda to wipe down the interior walls, door, and seals.
Observe: Interior is visibly clean and free of mold or mildew.
Means: Mold and mildew can develop in damp areas and cause odors.
Next: Check the rinse aid dispenser for buildup.
Clean the Rinse Aid Dispenser
Do: Remove the rinse aid dispenser and soak it in warm, soapy water. Use a soft-bristled brush to remove any residue or buildup.
Observe: Dispenser is clean and free of clogs or residue.
Means: A dirty dispenser can contribute to unpleasant odors.
Next: Reinstall the dispenser and run a test cycle.
Run a Test Cycle
Do: Load the dishwasher with a few dishes and run a normal cycle to ensure the odors have been eliminated.
Observe: No foul odors are present during or after the cycle.
Means: The dishwasher is functioning properly and free of lingering smells.
Next: Monitor the dishwasher for any recurring odors.
Check for Standing Water
Do: Inspect the bottom of the dishwasher for any standing water that may have accumulated.
Observe: No standing water is present in the dishwasher.
Means: Standing water can lead to mold and mildew growth, causing odors.
Next: Dry the interior with a clean towel if necessary.
Dry the Interior
Do: After cleaning, leave the dishwasher door slightly ajar to allow air to circulate and dry the interior completely.
Observe: Interior is dry and free of moisture.
Means: Moisture can promote the growth of mold and mildew, leading to odors.
Next: Monitor the dishwasher for any recurring odors.
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Clogged filter | Traps food particles and organic matter that decompose and cause odors. | High | Low | Dishwasher filter |
| Mold and mildew buildup | Moisture trapped in the dishwasher promotes mold and mildew growth. | High | Low | None |
| Dirty rinse aid dispenser | Residue in the dispenser can emit unpleasant odors during cycles. | Medium | Low | Rinse aid dispenser |
| Standing water | Water left in the dishwasher can lead to bacterial and mold growth. | Medium | Low | None |
| Food particles in the drain | Decomposing food particles in the drain can cause foul smells. | Medium | Medium | Dishwasher drain hose |
| Improper ventilation | Poor airflow can trap moisture and odors inside the dishwasher. | Low | Medium | Ventilation system |
| Old or expired detergent | Expired detergent can leave residue and cause odors. | Low | Low | Dishwasher detergent |
Parts matching
When replacing parts, ensure they match your dishwasher model and specifications.
- Dishwasher filter: model number and size
- Rinse aid dispenser: compatible with your dishwasher model
- Dishwasher drain hose: diameter and length matching the original
- Ventilation system: compatible with your dishwasher's airflow requirements
- Dishwasher detergent: type and brand recommended by the manufacturer
Always refer to your dishwasher's user manual for specific part compatibility and installation instructions.
Disclosure: We may earn a commission from qualifying purchases via affiliate links. Learn more.
When to call a pro
- The odor persists after multiple cleaning attempts
- You notice a foul smell coming from the drain or plumbing
- Standing water cannot be removed or is recurring
- The dishwasher's interior shows signs of mold or mildew that won't clean
- The rinse aid dispenser is damaged or difficult to clean
- The dishwasher's ventilation system is not functioning properly
- You suspect a deeper issue with the dishwasher's internal components
FAQ
How often should I clean my dishwasher to prevent bad smells?
Clean your dishwasher at least once a month using vinegar or baking soda to prevent buildup and odors.
Can I use bleach to clean my dishwasher?
Avoid using bleach as it can damage the dishwasher's interior and leave harmful residues. Use vinegar or baking soda instead.
Why does my dishwasher smell even after cleaning?
Persistent odors may indicate a clogged drain, mold buildup, or a need for professional inspection.
Is it normal for my dishwasher to have a slight smell after use?
A mild, soapy scent is normal, but a strong or foul odor is not and should be addressed.
Can using the wrong detergent cause bad smells?
Yes, using the wrong or expired detergent can leave residue and cause unpleasant odors. Always use the recommended type.