How to Clean a Dishwasher

6 steps 30 min Beginner

Dishwashers that smell or leave grime on dishes need cleaning, not replacing. Monthly maintenance keeps them running 15+ years. This covers the filter, the rinse, and a deep-cycle that addresses smell at the source.

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Step-by-Step Instructions

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Step 1: Pull and rinse the filter (the #1 fix)

Most modern dishwashers have a removable filter at the bottom — twists out, rinses under hot water, twists back in. People go years without doing this. Most rotten-egg smells disappear with a clean filter.

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Twist out the cylinder filter at the bottom

Look in the bottom of the tub. Twist counterclockwise to remove. Rinse all the gunk out.

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Toothbrush for filter mesh

Old toothbrush gets food particles out of the mesh better than just rinsing. ~$3.

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Rinse weekly if you have hard food residue

Big-eater families = weekly. Just two adults = monthly is fine.

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Step 2: Run a vinegar cycle (descales and deodorizes)

Place 1 cup of white vinegar in a dishwasher-safe cup on the TOP rack. Run a HOT cycle empty. Cuts mineral scale and deodorizes.

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White vinegar, 1 cup on top rack, hot cycle

Heinz or store brand. ~$3.

$0.10/use $3 for 30 View Details
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Affresh dishwasher cleaner (proprietary)

Drop a tablet at the bottom, run hot. Made for the job. ~$8.

$1.33/use $8 for 6 View Details
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Lemi-Shine descaler (mineral buildup)

Citric acid powder. Best for hard-water areas. ~$10.

$0.83/use $10 for 12 View Details
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Step 3: Run a baking soda cycle (neutralizes smells)

After the vinegar cycle, sprinkle 1 cup baking soda on the bottom of the dishwasher. Run a short hot cycle. Brightens the interior and removes any residual vinegar smell.

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Arm & Hammer baking soda, 1 cup, short hot cycle

Sprinkle bottom. Run short cycle. ~$3.

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Run the cycles separately (not at the same time)

Vinegar + baking soda = neutralization reaction that does nothing. Run them in sequence.

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Step 4: Clean the spray arms

Spray arm holes clog with mineral deposits and food bits — water can't blast at full pressure. Pop off the arms (usually a twist or a clip), poke each hole with a toothpick or wire.

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Pop off arms, clear holes with toothpick

Top and bottom arms. Each hole should spray clear water when reattached.

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Soak arms in white vinegar 30 min

Heavy scale removal. Soak, rinse, reinstall.

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Step 5: Wipe the gasket (door seal)

The rubber gasket around the door traps food and mildew. Wipe with hot soapy water + a damp microfiber. Black mildew = needs vinegar + scrub.

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Hot soapy water + microfiber wipe

Pull the gasket gently to clean the underside too.

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Vinegar for mildew

Spray, wait 5 min, scrub with toothbrush. Black mildew flakes off.

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Step 6: Monthly schedule + add rinse aid

Monthly: clean filter + vinegar cycle. Always: keep rinse aid topped off. Rinse aid prevents water spots and helps the soap rinse cleanly.

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Finish Jet-Dry rinse aid

Refill the rinse aid dispenser when the light comes on. Major improvement on spotting. ~$8.

$0.08/use $8 for 100 View Details
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Set monthly cleaning reminder

Phone reminder on the 1st. Less than 30 minutes including the cycle wait.

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