Clean the filter and drain monthly to stop food buildup

The filter is where most debris collects, and a clogged filter reduces cleaning power and creates odors. On KitchenAid models, the filter sits at the bottom of the tub — usually a cylindrical or basket-shaped piece that twists or lifts out. Pull it straight up, then rinse it under running water while brushing away trapped food with an old toothbrush. If food is baked on, soak the filter in hot water for 15 minutes first.

While the filter is out, check the drain opening directly below it. Use a flashlight to spot debris, then remove it by hand or with tweezers. Food particles and grease can collect here and block water from draining properly. Wipe the drain area with a damp cloth to clear any remaining residue.

Replace the filter by reversing the removal steps — it should sit flat and click or lock into place. Do this once a month, or more often if you notice water pooling at the bottom after a cycle.

Key Takeaways

  • Remove and rinse the filter monthly under running water, using a soft brush to dislodge trapped food.
  • Check the drain opening below the filter for debris and remove it by hand or tweezers.
  • Run a cleaning cycle with vinegar or a commercial dishwasher cleaner every three months to dissolve mineral buildup.
  • Wipe the door gasket and spray arms with a damp cloth to prevent mold and keep water jets clear.
  • Load dishes correctly — scrape food off first, don't block the spray arms, and use the right rack for each item type.

Run a vinegar cycle every three months to dissolve mineral deposits

Hard water leaves mineral buildup inside the tub, on the heating element, and in the spray arms. This reduces water temperature and spray force, making dishes come out less clean. The simplest fix is a vinegar cycle: place a bowl filled with white vinegar on the top rack, run a hot water cycle with no dishes inside, and let the vinegar spray through the entire machine.

If you prefer a commercial product, KitchenAid-compatible dishwasher cleaners like Affresh or Finish work the same way — place the tablet or liquid in the tub and run a cycle. These products are stronger than vinegar and work faster, but vinegar is cheaper and works just as well over time. Do this every three months, or more often if you live in a hard water area.

Wipe the door gasket and spray arms to prevent mold and clogs

The rubber gasket around the door traps moisture and food particles, creating a breeding ground for mold and mildew. After each load, wipe the gasket with a damp cloth, paying attention to the folds where debris hides. If you see black spots or smell mold, soak a cloth in white vinegar and wipe the gasket thoroughly, then run a hot cycle to dry it out.

The spray arms — the rotating pieces that shoot water onto dishes — can become clogged by mineral deposits or food particles. Remove them by twisting or unclipping (check your model's manual for the exact method), then hold each arm under running water and use a toothpick or small brush to clear the spray holes. Reinstall them so they spin freely without hitting the tub walls.

Clean the exterior and control panel with the right cloth

KitchenAid dishwashers often have stainless steel fronts that show fingerprints and water spots. Use a microfiber cloth slightly dampened with water, or a cloth designed for stainless steel. Wipe in the direction of the grain to avoid streaks. Never use abrasive scrubbers or harsh chemicals, which can scratch the finish.

For the control panel, use a dry or barely damp cloth to avoid water seeping into the buttons. If the display is hard to read, a gentle wipe with a microfiber cloth usually clears dust and fingerprints without damage.

Load dishes correctly to prevent clogs and improve cleaning

How you load the dishwasher affects how well it cleans and how often you need to maintain it. Scrape food off plates and bowls before loading — the dishwasher rinses, it does not scrub off baked-on food. Place larger items on the bottom rack and smaller items on the top. Never block the spray arms; they need to rotate freely to reach all surfaces.

Glasses and mugs go on the top rack, angled downward so water drains out rather than pooling inside. Plates go on the bottom rack standing upright or at a slight angle. Avoid stacking items so tightly that water cannot reach between them. Load utensils handle-down in the basket, except for long knives, which should lie flat on the top rack for safety.

Check the inlet valve and water supply line if water is not filling

If the tub is not filling with water or fills very slowly, the inlet valve may be clogged. This valve controls water flow into the machine and can become blocked by mineral deposits or debris. Turn off the water supply to the dishwasher (usually a valve under the sink), then locate the inlet valve — typically a small cylindrical part where the water line connects to the back of the machine. Consult your model's manual for its exact location.

Remove the water line by turning the fitting counterclockwise, then turn the water back on briefly to flush out debris into a bucket. If the valve itself is clogged, you may need to replace it — this is a job for a technician unless you are comfortable with appliance repair. Reconnect the water line and test the machine.

Run a cleaning cycle after heavy use or if you notice odors

If your dishwasher smells sour or musty, bacteria and mold are growing inside. Run a hot water cycle with a commercial cleaner or a bowl of vinegar on the top rack. If the smell persists after one cycle, run a second cycle the next day. Between cycles, leave the door open to air out the tub.

If you run the dishwasher daily or load it with heavily soiled dishes, run a cleaning cycle once a month instead of every three months. Heavy use means more food debris and mineral buildup, so more frequent cleaning keeps the machine running at full power.

Frequently Asked Questions

Can I use bleach to clean my KitchenAid dishwasher?

No. Bleach can damage the stainless steel interior and rubber gasket. Use vinegar or a commercial dishwasher cleaner instead. If you need to disinfect after a mold problem, run a hot cycle with vinegar, which has mild antimicrobial properties.

Why is water pooling at the bottom after the cycle ends?

A clogged filter or drain is the most common cause. Remove the filter, rinse it thoroughly, and check the drain opening for debris. If water still pools after cleaning the filter, the drain pump or inlet valve may need professional repair.

How do I know if the spray arms are clogged?

Dishes come out wet or dirty on one side, or you notice weak water pressure during the cycle. Remove the spray arms and hold them up to a light — you should see water holes clearly. Use a toothpick to clear any blocked holes, then reinstall and test.

Is it safe to run the dishwasher empty during a cleaning cycle?

Yes. Running an empty cycle with vinegar or a commercial cleaner is the standard way to clean the interior. It allows the cleaning solution to reach all surfaces without dishes blocking the spray.

What should I do if the door will not close properly?

Check the gasket for food debris or buildup that prevents a tight seal. Clean the gasket thoroughly and wipe the door frame. If the door still does not close, the latch or hinges may be damaged and need professional repair.