How to Clean Your Dishwasher the Right Way

Your dishwasher cleans your dishes, but it doesn't clean itself. Grease, food debris, mineral deposits, and detergent residue build up inside the machine over time — reducing cleaning performance, causing odors, and shortening the appliance's life. Here's a complete cleaning guide with a schedule you can actually follow.

Your Dishwasher Cleaning Schedule

• After every cycle: leave the door slightly ajar to allow the interior to dry out
• Weekly: wipe down the door gasket and door edges
• Monthly: clean the filter, run a vinegar cycle, clean spray arms
• Every 3 months: run a descaling cycle (especially in hard water areas)
• Every 6 months: deep clean the dispenser drawer, inspect hoses

How to Clean the Filter

The filter is typically located at the bottom of the tub, behind the lower spray arm. Most modern Bosch, Whirlpool, LG, and Samsung dishwashers have a two-part manual filter: an upper cylindrical filter and a lower flat mesh filter.

To clean it: remove the lower rack, twist the cylindrical filter counterclockwise and pull it up, then lift out the flat mesh filter beneath it. Rinse both parts under warm water while scrubbing lightly with a soft brush. If heavily soiled, soak in warm soapy water for 10 minutes. Never use steel wool or abrasive scrubbers — they damage the mesh. Reinstall by reversing the removal steps.

How to Clean the Spray Arms

Remove the spray arms (they usually unscrew or unclip from the center hub). Hold each arm up to the light and look for clogged jets. Use a toothpick or bamboo skewer to clear blocked holes. Rinse the arms under running water, shaking to dislodge any internal debris. Check that the arm spins freely before reinstalling.

The Vinegar Cleaning Cycle

Place a dishwasher-safe container (a measuring cup or bowl) filled with 2 cups of white vinegar on the bottom rack of an empty dishwasher. Run a full hot cycle. The vinegar dissolves mineral deposits, grease, and soap scum from the spray arms, interior walls, heating element, and drain area. Do not add detergent.

The Baking Soda Cycle

Immediately after the vinegar cycle (or as a standalone treatment for odors), sprinkle 1 cup of baking soda across the bottom of the empty tub. Run a short hot cycle. Baking soda neutralizes remaining odors and brightens stainless steel interiors.

Cleaning the Door Gasket

The rubber door seal accumulates mold and mildew in its folds. Mix equal parts white vinegar and water in a spray bottle. Spray the gasket, pull back the folds, and scrub with an old toothbrush. For visible mold, a small amount of diluted bleach (1 tablespoon per cup of water) works well — rinse thoroughly afterward.

Cleaning the Detergent Dispenser

Detergent residue and hardened soap can build up in the dispenser drawer, causing the door to stick or release detergent at the wrong time. Wipe the dispenser interior with a damp cloth, and use an old toothbrush to clean the door spring and recess. Remove the drawer entirely if it unclips, and rinse under warm water.

Commercial Dishwasher Cleaners

Products like Affresh Dishwasher Cleaner, Cascade Dishwasher Cleaner, and Finish Dishwasher Cleaner are formulated to dissolve grease, limescale, and residue from the full interior of the machine. They're a convenient alternative to the vinegar method and are particularly effective for mineral buildup. Use one tablet monthly in an empty machine on a hot cycle.