How to clean a dishwasher properly involves more than running an empty hot cycle. The filter, spray arms, door seal, and interior walls each need specific attention.
This guide covers the full process, the natural method, and the filter steps that most instructions leave out.
What to Check Before Cleaning Your Dishwasher
A quick visual check takes two minutes and tells you which parts need the most attention before you start.
| What to Check | Why It Matters |
|---|---|
| Last time filter was cleaned | A clogged filter is the most common cause of odors and poor wash performance |
| Spray arms for blockages | Blocked holes reduce water pressure to the dishes above |
| Door seal for mold or debris | Rubber seals trap moisture and develop mold quickly |
| Drain area for standing water | Pooling water signals a drainage issue that cleaning will not fix alone |
| Interior walls for grease film | Grease from dishes coats the interior and transfers back onto future loads |
How to Clean a Dishwasher Step by Step
With the checks done, you have a clear picture of what needs the most attention. The sequence below works from the interior out, which prevents recontaminating surfaces you have already cleaned.
Step 1: Clean the Interior Walls and Bottom
- Remove the bottom rack completely to access the floor of the dishwasher.
- Use a damp cloth or sponge with a small amount of dish soap to wipe down the interior walls.
- Focusing on the sides and the area around the door hinge where grease accumulates most.
The floor of the dishwasher collects the most debris.
- Use a paper towel to remove any pooled water or loose food around the drain area first.
- Then wipe the floor surface with a soapy cloth.
- Rinse with a clean damp cloth to remove soap residue before moving on.
Step 2: Wash the Spray Arms and Door Seals
Spray arms are easy to overlook and frequently the source of spotty dishes. Most dishwasher spray arms twist or clip off without tools.
- Remove both the lower and upper arms if your model allows it.
- Hold each arm under running water and use a toothpick or thin wire to clear any blocked holes. A blocked hole reduces water pressure to that section of the rack.
- Rinse thoroughly and reattach.
Step 3: Wipe Down the Exterior
How to clean a dishwasher exterior is quick. A damp microfiber cloth removes fingerprints and water marks from stainless steel fronts.
- For stainless steel, wipe in the direction of the grain to avoid visible streaks.
- For plastic or painted fronts, any mild all-purpose cleaner works.
Step 4: Run a Cleaning Cycle
Once the manual cleaning is done, run a hot cleaning cycle to flush residue from the interior and the drain line.
- Place a dishwasher-safe cup filled with white vinegar on the top rack.
- Run the longest, hottest cycle available on your machine.
The vinegar loosens mineral deposits and deodorizes the interior during the cycle.
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How to Clean a Dishwasher Filter
The filter is the part most people never clean because they did not know dishwashers had one. Most modern dishwashers use a manual filter rather than a self-cleaning system.
If your dishwasher has developed an odor that cleaning cycles do not resolve, the filter is almost certainly the reason.
Step 1: Remove the Dishwasher Filter
The filter sits at the bottom of the dishwasher tub, usually beneath the lower spray arm. It typically consists of two parts: a cylindrical upper filter and a flat mesh lower filter.
- Twist the upper filter counterclockwise and lift it out.
- Then lift the flat lower filter from its housing.
Some models require a gentle pull without any twisting. If you are unsure of the exact method for your machine, check the manual or search the model number online.
Step 2: Scrub and Rinse the Filter Thoroughly
The second step of how to clean a dishwasher filter is scrub and rinse thoroughly.
- Take both filter components to the sink.
- Rinse them under warm running water to remove loose debris.
- Then use a soft brush (an old toothbrush works well) with a small amount of dish soap to scrub the mesh surfaces.
Step 3: Reinstall the Filter Properly
Seat the flat lower filter back into its housing first, ensuring it lies flat with no raised edges. Then insert the upper cylindrical filter and twist clockwise until it locks into place.
An improperly reinstalled filter allows food particles to recirculate and reach the pump. It also allows larger debris to reach the drain, which can cause blockages. Take a moment to confirm both pieces are seated correctly before running the next cycle.
Natural Ways to Clean a Dishwasher
How to clean a dishwasher naturally uses two ingredients you likely already have and avoids commercial cleaning tablets that leave chemical residues on food contact surfaces.
- Clean with vinegar
White vinegar dissolves mineral deposits and grease, and its acidity inhibits bacterial growth. Place a cup of white vinegar on the top rack and run a hot cycle.
How to clean a dishwasher with vinegar is most effective for mineral buildup from hard water and mild odors. Use it monthly as a maintenance step.
- Use baking soda to remove odors
Baking soda neutralizes acidic food odors and brightens yellowed plastic interiors. Sprinkle one cup across the bottom of an empty dishwasher and run a short hot cycle. It does not descale or disinfect, but it handles odor more effectively than vinegar does.
- Avoid harsh chemical cleaners
Bleach damages stainless steel interiors and rubber seals over time. Abrasive scrubbing powders scratch the plastic lining.
Stick to dish soap for manual scrubbing and vinegar or baking soda for cleaning cycles. These two cover nearly every cleaning situation a dishwasher presents.
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FAQs
What Is the Best Way to Clean a Dishwasher?
Manual scrubbing of the interior walls, spray arms, and door seal, followed by a vinegar cycle and a baking soda cycle, is the most thorough method. Do these steps together monthly.
Weekly filter removal and rinsing prevents the odor and performance issues that monthly cleaning alone does not catch.
How Do I Give My Dishwasher a Deep Clean?
Remove and scrub the filter, clear the spray arm holes, wipe the door seal with a baking soda paste, wipe the interior walls, run a vinegar cycle, then run a baking soda cycle.
This full sequence addresses every part of the machine and takes about 30 minutes of active time plus two cycle run times.
Can You Run Vinegar Through a Dishwasher to Clean It?
Yes. Place a dishwasher-safe cup filled with white vinegar on the top rack and run a hot cycle with no dishes and no detergent. The vinegar circulates through the spray arms and contacts the full interior surface.
What Happens if You Put Vinegar and Baking Soda in the Dishwasher Together?
They neutralize each other through an acid-base reaction. The fizzing looks active but the two ingredients cancel out before either can do much cleaning. Run them in separate cycles: vinegar first, then baking soda in the next cycle. This way each ingredient works at full strength.
Bottom Lines
How to clean a dishwasher is not just about eliminating odor. A clogged filter, blocked spray arms, or a grease-coated interior all reduce cleaning performance, which means dishes come out less clean even though the machine runs the same cycle.
The filter is the part worth cleaning most consistently. Monthly vinegar and baking soda cycles handle the rest. Knowing how to clean a dishwasher properly takes the guesswork out and turns a once-a-year panic clean into a routine that takes less than an hour.
