Direct Answer
To clean a dishwasher properly, empty it, clean the filter and spray arms, wipe the interior and door seals, then run a hot cleaning cycle with vinegar or a dishwasher-safe cleaner. Cleaning the filter and hidden components is what prevents odor and poor performance. Most dishwashers can be cleaned thoroughly in about 30–45 minutes, not including cycle time.
Supplies Needed
- White vinegar
- Baking soda (optional)
- Soft sponge or microfiber cloth
- Old toothbrush
- Warm soapy water
- Toothpick or small brush (for spray arm holes)
Step-by-Step Instructions
1. Empty the Dishwasher
Remove all dishes and utensil racks if they are easily detachable.
Pull out the bottom rack to access the filter area. Cleaning works best when the interior is fully accessible.
2. Remove and Clean the Filter
Locate the filter at the bottom of the dishwasher (usually a twist-lock cylinder).
Remove it carefully and rinse under warm running water.
Use a soft brush or toothbrush with mild dish soap to remove trapped food particles. Avoid using abrasive pads.
The filter is often the main source of dishwasher odor. If it has not been cleaned recently, buildup may be significant.
Reinstall the filter securely after cleaning.
3. Clear the Spray Arms
Check the spray arms for clogged holes.
If you see debris:
- Remove the spray arms if your model allows
- Use a toothpick or small brush to clear blockages
- Rinse thoroughly
Blocked spray arms reduce water pressure and lead to poorly cleaned dishes.
4. Wipe the Interior and Door Seals
Use warm, soapy water to wipe:
- Interior walls
- Door edges
- Rubber seals (gaskets)
- Around the detergent dispenser
Food residue and grease often collect along the door perimeter, where water does not circulate as strongly.
Dry seals after wiping to prevent mildew odor.
5. Run a Vinegar Cleaning Cycle
Place 1 cup of white vinegar in a dishwasher-safe bowl on the top rack.
Run a hot water cycle with the dishwasher empty.
Vinegar helps dissolve grease and mineral buildup inside the tub and along internal components.
Do not add detergent during this cycle.
6. Optional: Baking Soda Freshening Cycle
After the vinegar cycle completes, sprinkle ½ cup baking soda across the bottom of the dishwasher.
Run a short hot cycle.
This step can help neutralize lingering odor and brighten the interior.
Why This Method Works
Food particles trapped in the filter break down and cause odor. Grease and mineral deposits build up inside the tub and spray arms over time. Cleaning the filter and clearing spray arms restores water flow. Running a hot vinegar cycle helps dissolve buildup inside areas that cannot be wiped manually.
Addressing both visible and hidden components improves cleaning performance.
Common Mistakes to Avoid
- Skipping the filter cleaning
- Using bleach in stainless steel interiors
- Running cleaning cycles with dishes inside
- Ignoring door seals
- Forgetting to reinstall the filter securely
Optional Tips
- Clean the filter once a month in households that use the dishwasher daily.
- Scrape large food particles from dishes before loading.
- Leave the door slightly open after cycles to reduce moisture buildup.
When to Call a Professional
Contact a technician if:
- Dishes remain dirty despite cleaning
- Water does not drain properly
- You hear unusual grinding noises
- The dishwasher leaks
These issues may indicate mechanical problems rather than surface buildup.
Final Notes
A clean dishwasher cleans dishes more effectively and prevents odor from building inside the appliance. Regular filter maintenance and periodic cleaning cycles keep performance consistent and reduce long-term wear.
