How to Clean Your Dishwasher Filter, Spray Arms, and Interior
Regular dishwasher cleaning prevents unpleasant odors, improves cleaning performance, and extends your appliance's lifespan by preventing buildup and clogs. This simple monthly maintenance task takes just 20-30 minutes and requires no special skills—anyone can do it with basic household items. A clean dishwasher will wash your dishes more effectively and keep your kitchen smelling fresh.
What You'll Need
Supplies
- •White vinegar($3-5)
- •Baking soda (optional alternative)(optional)($2-3)
- •Dish soap(optional)(free (likely have at home))
Tools
- •Soft-bristled brush or old toothbrush
- •Small toothpick or straightened paperclip
- •Damp cloth or sponge
- •Small bowl or container(optional)
Step-by-Step Instructions
Empty the dishwasher completely
Remove all dishes, racks, and utensil baskets from the dishwasher to give yourself full access to the interior. This allows you to inspect the filter, spray arms, and all surfaces without obstruction. Make sure the dishwasher is not running before you start.
Locate and remove the filter assembly
Open the dishwasher door and look at the bottom center—you'll find a cylindrical or mesh filter assembly. Most filters twist counterclockwise to unlock and pull out easily; consult your owner's manual if your model uses a different removal method. Set the filter aside for cleaning.
Pro Tip: Take a photo of your filter or note the model number before removal so you can research any specific cleaning instructions for your brand.
Rinse the filter under running water
Hold the filter under warm running water and rinse away visible food particles, grease, and debris. Use a soft brush or old toothbrush to gently scrub the mesh surfaces, working in circular motions to dislodge trapped particles. Rinse thoroughly until the water runs clear.
Pro Tip: For stubborn buildup, soak the filter in warm water with a bit of dish soap for 10-15 minutes before brushing.
Soak the filter in a cleaning solution
Fill a bowl or sink with warm water and add either a cup of white vinegar or a tablespoon of baking soda. Place the filter in this solution and let it soak for 15-20 minutes to dissolve mineral deposits and stubborn residue. This step is especially important if your dishwasher has hard water or hasn't been cleaned in several months.
Pro Tip: White vinegar works especially well for mineral deposits and odor removal, while baking soda is gentler and excellent for general cleaning.
Clean the spray arms
Locate the spray arms (usually found at the bottom and sometimes on the top rack) and pull them out or unscrew them according to your model. Rinse them thoroughly under warm running water, then use a small brush or toothpick to carefully clear the spray holes—these often clog with debris and mineral buildup. Soak the arms in your vinegar or baking soda solution for 10 minutes if needed.
Pro Tip: The spray holes are small and critical for proper water distribution; use a toothpick or thin brush gently to avoid enlarging the holes.
Wipe down the interior surfaces
Use a damp cloth or sponge to wipe the interior walls, door seals, and floor of the dishwasher to remove any loose debris, grease, or mold growth. Pay special attention to the rubber gasket around the door, as this area often traps food particles and moisture. Wipe away any visible grime and ensure all surfaces are clean and moist.
Pro Tip: For stubborn mold or mildew on gaskets, use a cloth dampened with white vinegar and let it sit for a few minutes before wiping.
Reinstall the filter and spray arms
Once everything is clean and rinsed, reinstall the filter by twisting it clockwise back into position until it's snug but not overtightened. Reattach the spray arms by sliding them back onto their posts or screwing them in according to your model's design. Make sure both components are properly secured and sit flat without wobbling.
Pro Tip: If your filter feels difficult to reinstall, double-check that you're twisting in the correct direction and that any notches or tabs are aligned properly.
Run a cleaning cycle with vinegar
Place a bowl or cup containing 2 cups of white vinegar on the bottom rack of the empty dishwasher (not in a cup that will flip or slide during the cycle). Run the dishwasher on the hottest cycle available—this will distribute the vinegar throughout the machine to dissolve remaining mineral deposits and sanitize all interior surfaces. Once the cycle completes, run a second empty cycle with just water to rinse away any vinegar smell.
Pro Tip: This vinegar cycle is the final touch that removes odors, mineral buildup, and disinfects the entire interior for optimal performance.
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