How to Clean a Dishwasher the Right Way?

It is a common misconception that since a dishwasher uses soap and water to clean your dishes, it is self-cleaning. In reality, your dishwasher is a machine that traps food particles, grease, and mineral deposits in its most critical components. When ignored, these remnants don’t just smell; they lead to clogs, cloudy glassware, and inefficient wash cycles.

At Harmony Cleaning Services, we view the dishwasher as one of the most important appliances in your kitchen’s ecosystem. Here is how to keep yours running like new.

Why Dishwashers Still Need Cleaning

Think of your dishwasher as a recycler. The water circulates through your dishes, but if the filter is clogged, that “dirty” water is simply being sprayed back onto your plates. Over time, bacteria, mold, and grease buildup—not to mention hard water scale—can turn your machine from a cleaner into a contaminant spreader.

Dishwasher Parts You Should Clean

Filter: This is the heart of the machine. It catches the bits of pasta, labels, and debris that shouldn’t go down the drain. It is the #1 cause of odors and drainage issues.
Spray Arms: The small holes in these rotating arms often get plugged with hard water minerals or food, reducing water pressure and leaving dishes spotty.
Door Gasket: This rubber seal is a magnet for “gunk”—hair, bits of food, and moisture that can lead to mold growth.
Interior Tub: The walls, floor, and racks collect grease film that can harbor bacteria.

Step-by-Step Dishwasher Cleaning Method

Clear the Filter: Locate the filter at the bottom of the tub. Twist it to remove it, rinse it under hot water, and use a soft toothbrush to gently scrub away any debris.
Unclog Spray Arms: If they are removable, take them out and check the holes. Use a toothpick or a small needle to clear any mineral blockages.
Wipe the Gasket: Use a soft, damp cloth with a little mild dish soap to scrub the rubber seal. Don’t forget the underside of the door, where food often accumulates.
The Vinegar/Baking Soda Cycle:
- Place a dishwasher-safe cup of white vinegar on the top rack (empty) and run a hot water cycle. This breaks down grease and mineral deposits.
- Once complete, sprinkle a cup of baking soda on the bottom of the tub and run a short, hot cycle. This deodorizes the machine and lifts remaining grime.

How Often Should You Clean a Dishwasher?

Filter: Monthly (or bi-weekly if you have a busy household).
Gasket: Monthly.
Full Interior Deep Clean: Every 3 to 6 months.

Signs Your Dishwasher Needs Cleaning

Persistent Odors: That “musty” smell when you open the door.
Gritty Dishes: A thin layer of film or sand-like particles on your glassware after a wash.
Water Pooling: If water remains in the bottom of the tub after the cycle finishes, your filter is likely clogged.
Poor Drying Performance: Grease buildup on the heating element or interior walls can prevent proper moisture evaporation.

Best Dishwasher Cleaning Products and DIY Options

DIY: White vinegar and baking soda are the gold standard for breaking down limescale and neutralizing odors.
Commercial: If you have severe hard water scale, look for citric-acid-based dishwasher cleaners. Citric acid is highly effective at dissolving mineral deposits that vinegar might struggle with.

How Regular Kitchen Cleaning Prevents Odors

The best way to maintain a clean dishwasher is to scrape your plates. Even though many machines say “no pre-rinsing required,” scraping large chunks of food into the trash rather than the dishwasher prevents your filter from being overwhelmed. Additionally, always leave the door slightly ajar after a cycle to allow the interior to dry, which prevents mold and mildew.

FAQ

How often should a dishwasher be cleaned?

You should check and clean the filter at least once a month. A full interior cleaning cycle is recommended every 3 to 6 months.

How do you clean a dishwasher filter?

Remove it from the bottom of the unit, rinse it under hot running water, and use a soft-bristle brush (like a toothbrush) to clear debris from the mesh screen.

Can you clean a dishwasher with vinegar?

Yes, vinegar is excellent for removing mineral deposits and grease. Place a cup of it on the top rack and run a hot cycle. Note: Avoid using vinegar if you have significant rubber seal issues, as long-term acidity can weaken them.

Why does my dishwasher smell bad?

The odor is almost always caused by trapped food particles in the filter, rotting debris in the door gasket, or stagnant water due to a slow-draining system.

Is your dishwasher failing to leave your dishes spotless? At Harmony Cleaning Services, we understand that a clean kitchen starts with clean appliances. Let us handle the deep-cleaning tasks so you can have total peace of mind.

Contact Harmony Cleaning Services today to book your next professional cleaning!