Quick Answer
To clean a dishwasher filter and door seal, twist and remove the cylindrical mesh filter from the base of the tub, wash it with warm soapy water and a soft brush, and wipe down the rubber door seal with a mild vinegar solution. Run a monthly empty hot cycle with a dishwasher cleaner tablet or white vinegar to eliminate hidden grease, food particles, and musty odors.
Why Dishwashers Smell Even After a Cycle
Even when your dishes come out sparkling clean, your dishwasher can start to develop a foul, swampy odor over time. Modern dishwashers do not liquefy every piece of food washed off your plates; instead, tiny food particles, grease, and soap scum get trapped inside the cylindrical mesh filter at the bottom of the tub. When this trapped organic debris sits in a warm, dark, enclosed environment between wash cycles, it quickly breeds bacteria, mold, and unpleasant odors.
How to Find and Remove the Dishwasher Filter
In most modern dishwashers, the filter is located at the bottom of the tub beneath the lower spray arm.
Cleaning the Filter Safely
- Locate and Unlock: Open the dishwasher, pull out the bottom rack, and look near the base. You will see a plastic cylindrical mesh filter. Turn it counter-clockwise and lift it out.
- Wash Away Debris: Take the filter to the kitchen sink. Rinse off loose food particles under warm running water. Use a soft-bristled brush (like an old toothbrush) and a drop of dish soap to gently scrub the fine mesh screen without puncturing it.
- Reinstall Securely: Place the filter back into its housing and twist it clockwise until it locks firmly into place. Never run your dishwasher without the filter installed, as large food debris can clog the drain pump.
Cleaning the Filter Housing
Once the filter is removed, look down into the circular sump housing underneath. Use a damp microfiber cloth or sponge to scoop out any standing water, hair, grease, or slimy food sludge trapped in the bottom tray before putting the clean filter back.
How to Clean the Door Seal
Food Residue
The rubber gasket around the door opening acts like a trap for floating food splatters, coffee splashes, and rogue crumbs during wash cycles. Wipe these particles away with a damp cloth.
Greasy Film
Oils from greasy pots and pans coat the rubber seal over time. Use warm water and a small amount of dish soap on a soft cloth to cut through the grease.
Mildew-Prone Areas
Fold back the crevices of the rubber seal where moisture hides. If you notice dark pink or black mold spots, wipe the area with a mild water-and-vinegar solution or a specialized mold-safe cleaner to eliminate spores and prevent musty smells.
How to Clean Spray Arms and Interior Walls
When to Use Vinegar
Place a dishwasher-safe bowl filled with 1 cup of white vinegar on the top rack of an empty dishwasher. Run a hot water cycle. The vinegar cuts through mineral scale, hard water buildup, and lingering grease while neutralizing foul odors. (Note: Avoid using vinegar if your dishwasher has stainless steel interior components that state vinegar could damage the finish, or check manufacturer guidelines).
When to Use a Dishwasher Cleaner
Commercial dishwasher cleaner tablets or liquid pouches are formulated to strip away tough soap scum, hard water mineral deposits, and hidden grease from the inner walls and spray arm jets. Place the cleaner in the detergent cup or on the bottom of the tub and run a hot cycle monthly.
How Often Should You Clean a Dishwasher Filter?
Weekly Rinse
Remove and rinse your dishwasher filter under warm running water every 1 to 2 weeks if you run heavy loads or rarely pre-rinse your dishes.
Monthly Deep Clean
Perform a thorough monthly deep clean by scrubbing the filter with soap, wiping down the door gasket, and running an empty hot cleaning cycle with a dishwasher cleaner tablet.
Professional Kitchen Cleaning Support
Keeping your dishwasher filter and appliances clean is a key part of maintaining a hygienic home. For more kitchen maintenance tips, explore our guides on solving kitchen sink odors, mastering refrigerator cleaning, and wiping down kitchen countertops.
When you want a truly immaculate kitchen and home without lifting a finger, our Recurring Cleaning service ensures your appliances, surfaces, and living areas stay effortlessly spotless year-round.
Frequently Asked Questions
Where is the dishwasher filter?
The dishwasher filter is located at the very bottom of the tub floor, typically underneath or right next to the lower rotating spray arm.
How often should it be cleaned?
The filter should be rinsed out every week or two, and given a thorough deep clean once a month along with the door seal and spray arms.
Why does my dishwasher smell bad?
A bad smell is almost always caused by rotting food particles, grease, and soap scum trapped inside the mesh filter or stagnant water sitting in the filter housing sump.
Can I put vinegar in my dishwasher?
Yes! Placing a bowl of white vinegar on the top rack during a hot water cycle is a fantastic, natural way to deodorize and cut through grease and hard water scaling.
What happens if I never clean the filter?
If you never clean the filter, food debris will restrict drainage, cause standing water to pool at the bottom, breed severe bacteria and mold, emit foul odors, and potentially burn out your dishwasher’s drain pump.