How to Clean Dishwasher Interior | Step-by-Step Guide for a Efficient Machine

Even though a dishwasher cleans dishes every day, the inside of the machine slowly collects grease, food particles, soap residue, and mineral deposits. Over time this buildup causes bad smells, cloudy glasses, and weak cleaning performance. The good news is that a proper interior clean takes less than an hour and requires only a few household items.

Follow this simple routine to keep your dishwasher fresh and working like new.

Step 1 — Empty the Dishwasher and Check the Bottom

Start with a completely empty dishwasher.

Pull out the bottom rack and inspect the drain area for:

• Food scraps

• Broken glass pieces

• Paper labels or bones

• Grease buildup

Remove anything visible by hand or with a paper towel. Clearing this area first prevents clogs during cleaning.

Step 2 — Remove and Wash the Filter

Most modern dishwashers have a removable filter at the bottom.

How to clean it:

1. Twist and lift the filter out

2. Rinse under warm running water

3. Use a soft brush to remove grease or stuck debris

4. Reinstall securely

A dirty filter is the most common reason for dishwasher odor and poor washing.

Step 3 — Clean the Spray Arms

Spray arms push water through small holes. If these clog, cleaning power drops.

Check for blocked holes and:

• Remove visible debris

• Use a toothpick to clear openings

• Rinse under running water

Make sure the arms spin freely before putting racks back.

Step 4 — Wipe the Door Seal and Edges

The rubber gasket around the door collects hidden grease and mold.

Use a soft cloth with warm soapy water and wipe:

• Rubber seal

• Door edges

• Hinges and corners

• Detergent compartment

This step removes the most odor-causing buildup.

Step 5 — Run a Vinegar Cleaning Cycle

Place one cup of white vinegar in a bowl on the top rack.

Run a hot empty cycle.

Vinegar helps dissolve:

• Soap scum

• Grease film

• Mineral deposits

• Odor-causing bacteria

Do not mix vinegar with detergent during this cycle.

Optional Step — Baking Soda Freshening (Extra Odor Removal)

After the vinegar cycle:

• Sprinkle one cup of baking soda on the bottom

• Run a short hot cycle

This brightens the interior and removes any remaining smell.

How Often You Should Clean the Dishwasher Interior

• Filter rinse → every 2–4 weeks

• Quick interior wipe → monthly

• Full vinegar deep clean → every 1–2 months

If you run the dishwasher daily, clean slightly more often.

Signs Your Dishwasher Needs Cleaning

Watch for:

• Bad smell when opening the door

• White film on glasses

• Food residue after washing

• Water pooling at the bottom

These signals mean buildup is already affecting performance.

Cleaning your dishwasher interior is simple but extremely important for long-term performance. Removing debris, washing the filter, clearing spray arms, wiping seals, and running a vinegar cycle keeps the machine odor-free and energy-efficient. Just a small cleaning routine every month can extend your dishwasher’s life and ensure every load comes out perfectly clean.

Read More:

How to prevent dishwasher leaks

How to prevent dishwasher clogging

Reduce dishwasher electricity usage

How to check dishwasher grounding

Dishwasher circulation maintenance