Most people don’t think much about how to clean the dishwasher, after all, it’s the machine that cleans other things, right? But over time, food debris, grease, soap scum, and hard water deposits build up inside, making your dishwasher less effective and potentially causing it to smell. A dirty dishwasher can leave residue on your dishes, and it may even shorten the appliance’s lifespan.
To keep your dishwasher running efficiently and smelling fresh, follow this simple but effective cleaning routine that targets all the key parts, spray arms, filters, seals, and interior surfaces.
Step 1: Check the Owner’s Manual
If you still have your dishwasher’s user manual, check it for any cleaning instructions specific to your model. Some dishwashers have removable filters or self-cleaning cycles, and it’s good to know how yours works. No manual? No problem, just follow these general steps.
Step 2: Clean the Spray Arms
The spray arms are crucial for distributing hot water throughout the dishwasher. If they become clogged with food particles or mineral buildup, your dishes won’t get fully clean.
How to Clean the Dishwasher’s Spray Arms
Pull out the bottom rack to access the lower spray arm.
Use a toothpick or a fine wire to gently remove debris from the spray holes. For visible debris like seeds or food particles sticking out, tweezers work well.
Dip an old toothbrush in warm water with a few drops of liquid dishwashing detergent (not regular dish soap) and scrub the spray arms gently.
If needed, remove the spray arms (refer to your manual), soak them in a sink filled with 1 cup white vinegar and warm water for 15–30 minutes, then scrub and rinse.
Check the area under the spray arm for bits of glass, food, or labels that may block water flow. Always unplug the dishwasher before removing any internal parts.
Once cleaned, make sure the spray arms spin freely and reassemble them correctly.
Step 3: Clean the Filter and Drain Area
Most modern dishwashers have a removable filter located at the bottom of the appliance, near the spray arms. This filter traps food particles and can become gunky or clogged over time.
Remove the bottom rack to access the filter (you may need to twist or lift it out).
Rinse it under warm running water and scrub gently with a soft brush or toothbrush to remove food buildup.
Clean around the drain area to make sure there are no foreign objects, like broken glass or food bits, that can cause drainage issues or odors.
Replace the filter securely.
Note: Never run the dishwasher without the filter in place. It helps protect the pump and keep dishes clean.
Step 4: Wipe Down the Interior and Door
Food splatter, detergent residue, and grime tend to collect around the door seals, hinges, and detergent dispenser.
How to Clean the Dishwasher’s Interior
Mix a solution of warm water and a small amount of liquid dishwashing detergent (not regular dish soap).
Use a soft cloth or sponge to wipe down:
Interior walls
Inside of the door
Detergent and rinse aid dispensers
Gasket (rubber seal around the door) – gently pull it back to get into the crevices
Use a toothbrush to scrub stubborn buildup in tight areas and along the edges.
Dry everything with a clean cloth when you’re done.
Step 5: Deodorize the Dishwasher
Over time, trapped food and moisture lead to mildew, mold, or a sour smell. Deodorizing neutralizes odors and freshens your appliance.
How to Deodorize and Deep Clean the Dishwasher
Option 1: White Vinegar
Place a dishwasher-safe cup or bowl filled with 1–2 cups of white vinegar on the top rack.
Run a full hot water cycle with the dishwasher empty.
Option 2: Baking Soda
After the vinegar cycle is complete, sprinkle 1 cup of baking soda across the bottom of the dishwasher.
Run another short hot water cycle.
You can use either method on its own, but together they pack a one-two punch: vinegar removes grease and dissolves mineral deposits, while baking soda neutralizes odors and gently scrubs away residue.
For extra freshness, add a few drops of lemon juice to the vinegar for a clean citrus scent.
Step 6: Clean the Exterior
Don’t forget the outside of your dishwasher, especially the control panel and handle, which get touched frequently.
Use a soft cloth and a mild all-purpose cleaner or diluted vinegar solution to wipe down the exterior.
For stainless steel dishwashers, polish with a microfiber cloth and a few drops of baby oil or a stainless steel cleaner. Always wipe with the grain.
How Often Should You Clean Your Dishwasher?
Weekly: Wipe down the gasket and door edges. Clean any visible debris in the filter.
Monthly: Deep clean using vinegar and/or baking soda.
Every 3–6 months: Remove and clean spray arms and the filter thoroughly.
How to Clean the Dishwasher
Knowing how to clean the dishwasher regularly is essential for keeping your appliance performing at its best. A clean dishwasher not only does a better job getting your dishes sparkling, but it also lasts longer and smells better. With just a little routine maintenance, scrubbing the spray arms, wiping seals, and running vinegar or baking soda cycles, you can keep your dishwasher in excellent shape.
Next time you hear it humming in the kitchen, you’ll know it’s doing its job, and that it’s clean enough to do it well.
