How to Clean Your Dishwasher So It Actually Cleans Your Dishes

Your dishwasher is supposed to clean dishes, but what cleans the dishwasher? Most Tri-Cities homeowners never think about this until their dishwasher starts leaving dishes dirty, produces bad odors, or stops draining properly. The truth is, dishwashers accumulate food debris, grease, soap scum, and mineral deposits—and they need regular cleaning to work properly.

At Sparkling Saige, we see neglected dishwashers all the time during our deep cleaning services. The good news? Cleaning your dishwasher is straightforward and makes a dramatic difference in performance. Here's how to do it right.

Signs Your Dishwasher Needs Cleaning

• Dishes come out with food particles still stuck on them

• Cloudy film on glasses

• Bad smell when you open the dishwasher

• Standing water at the bottom after a cycle

• Visible food debris or slime in the door seals or bottom

• Dishwasher takes longer to complete cycles

• Strange noises during operation

If you notice any of these issues, it's time for a deep clean.

Why Dishwashers Get Dirty

It seems counterintuitive—shouldn't all that hot water and soap keep the dishwasher clean? Unfortunately, no.

Food debris: Not all food particles wash down the drain. Some get trapped in the filter, spray arms, or seals.

Grease and soap buildup: Grease from dishes combines with detergent residue and hard water minerals to form a film on interior surfaces.

Hard water deposits: The Tri-Cities has moderately hard water. Minerals like calcium and magnesium accumulate on heating elements, spray arms, and interior walls, reducing efficiency.

Mold and mildew: The warm, moist environment is perfect for mold growth, especially in door seals and around the filter.

Regular cleaning prevents these issues and extends your dishwasher's life.

How Often to Clean Your Dishwasher

Monthly: Clean the filter and wipe down door seals

Every 3 months: Deep clean with vinegar and baking soda

As needed: Address any odors or performance issues immediately

What You'll Need

For regular cleaning:

• White vinegar

• Baking soda

• Dish soap

• Old toothbrush or small scrub brush

• Microfiber cloth

• Toothpick (for spray arm holes)

For tough buildup:

• Dishwasher cleaner product (like Affresh or Finish Dishwasher Cleaner)

• CLR or citric acid (for hard water deposits)

Step-by-Step Deep Cleaning Process

Step 1: Clean the Filter

This is the most important step and the most commonly neglected.

Locate the filter: The filter is at the bottom of the dishwasher, usually under the lower spray arm. It may be a cylindrical mesh filter that twists out, or a flat screen that lifts out.

Check your owner's manual if you're not sure how to remove it. Most twist counterclockwise or lift straight up.

Remove and rinse: Take out the filter and rinse it under hot running water. You'll probably see food particles, grease, and slimy buildup.

Scrub thoroughly: Use an old toothbrush and dish soap to scrub the filter mesh. Pay attention to all the little crevices where debris hides. For stubborn buildup, soak the filter in hot soapy water for 10-15 minutes, then scrub.

Clean the filter housing: With the filter removed, look at the area where it sits. You'll likely see more food debris and gunk. Use a damp cloth or sponge to wipe it clean. Some dishwashers have a second, coarser screen underneath the removable filter—clean this too.

Replace the filter: Once everything is clean, put the filter back in place. Make sure it's seated properly—an improperly installed filter can cause drainage problems.

Pro tip: Clean your filter monthly at minimum. If you have hard water or run the dishwasher daily, clean it every two weeks. A clogged filter is the #1 cause of poor dishwasher performance.

Step 2: Clean the Spray Arms

The spray arms have small holes where water jets out. These holes can get clogged with food particles and mineral deposits.

Remove the spray arms: Most spray arms simply lift off or unscrew. There's usually one at the bottom and one at the top. Check your manual if you're not sure how to remove them.

Inspect the holes: Hold the spray arm up to a light and look through the holes. If any are clogged, use a toothpick or thin wire to clear them. Don't use anything that could damage the holes.

Rinse thoroughly: Run the spray arms under hot water to flush out loosened debris.

Check for spin: Before reinstalling, make sure the spray arms spin freely. If they're stiff, there may be buildup in the mounting mechanism. Clean around the mounting area.

Replace: Put the spray arms back in place and ensure they spin freely when pushed.

Step 3: Wipe Down Interior Surfaces

Door and seals: The door seal (rubber gasket around the door opening) is a major source of odors. Food particles and moisture get trapped here and grow mold.

Use a damp cloth with a little dish soap to wipe all around the door seal. Pull the seal back gently to clean underneath—you'll probably find slime and debris. For mold spots, use a cloth dampened with vinegar or a mild bleach solution.

Wipe down the inside of the door, including the edges and the detergent dispenser.

Interior walls: Wipe down the interior walls, bottom, and ceiling of the dishwasher with a damp cloth. Pay attention to corners and edges where grime accumulates.

Racks: Check the dish racks for food debris caught in the tines or wheels. Wipe down as needed.

Step 4: Deep Clean with Vinegar

Why vinegar? Vinegar is acidic, which helps dissolve mineral deposits, soap scum, and grease. It also deodorizes naturally.

The process: Place a dishwasher-safe bowl or measuring cup filled with 2 cups of white vinegar on the top rack of your empty dishwasher.

Run a hot water cycle. The vinegar will mix with the water and clean the interior surfaces, spray arms, and drain.

Let the cycle complete fully.

What this does: The vinegar cycle removes soap scum, grease film, and hard water deposits. It also helps eliminate odors.

Note: Don't add vinegar to the detergent dispenser—it can damage rubber components over time. Always place it in a container on the top rack.

Step 5: Scrub with Baking Soda

After the vinegar cycle, sprinkle 1 cup of baking soda across the bottom of the dishwasher.

Run a short hot water cycle (no need to fill it again—just the bottom cycle).

What this does: Baking soda is a gentle abrasive and deodorizer. It helps remove any remaining stains on the interior surfaces and leaves the dishwasher smelling fresh.

The combination of vinegar followed by baking soda is powerful for deep cleaning and deodorizing.

Step 6: Clean the Exterior

Don't forget the outside of your dishwasher!

Control panel: Wipe down with a damp cloth. For stainless steel fronts, use stainless steel cleaner and wipe in the direction of the grain.

Handle: The handle gets touched constantly and harbors bacteria. Wipe it down with a disinfectant wipe or cloth with all-purpose cleaner.

Sides and top: If your dishwasher isn't built-in, wipe down the sides and top.

Dealing with Specific Problems

Bad Odors

If your dishwasher smells bad even after cleaning:

Check the drain hose: The hose that connects your dishwasher to the drain can develop clogs or buildup. If you're comfortable doing so, disconnect it and flush it with hot water. If not, call a plumber.

Run hot water before starting: Before starting the dishwasher, run your kitchen faucet until the water is hot. This ensures the dishwasher starts with hot water, which cleans better and helps prevent odors.

Leave the door open: After running a cycle, leave the dishwasher door slightly open to let it air dry completely. This prevents moisture buildup and mold growth.

Check for food in the bottom: Make sure there's no food debris under the filter or in the bottom of the tub.

Hard Water Buildup

The Tri-Cities has moderately hard water, which can leave mineral deposits (white or cloudy film) on dishes and dishwasher interior.

For mineral deposits: Run an empty cycle with 1 cup of CLR (placed on the top rack) or use citric acid powder (1/4 cup sprinkled in the bottom). This dissolves calcium and lime buildup.

For cloudy glasses: The cloudiness is mineral deposits or etching. For deposits, try soaking glasses in vinegar. For etching (permanent damage), unfortunately there's no fix.

Prevention: Use a rinse aid (like Jet-Dry) in your dishwasher. Rinse aids help water sheet off dishes instead of forming droplets that leave spots. They're especially important with hard water.

Consider installing a water softener if hard water is a major problem in your home.

Dishes Still Dirty After Cleaning Dishwasher

If your dishwasher still isn't cleaning well after you've cleaned it:

Check your loading: Overloading or improper loading blocks spray arms and prevents proper cleaning. Don't nest items. Face dirty surfaces toward spray arms.

Use quality detergent: Cheap detergents don't clean as well. Use a good brand and make sure it's fresh—detergent can lose potency over time.

Check water temperature: Your dishwasher needs water at least 120°F to clean properly. Test your water heater temperature and adjust if needed.

Inspect spray arms again: Make sure spray arms spin freely during operation. If they're hitting dishes or not spinning, they can't clean properly.

Check the heating element: If your dishwasher has a heating element (some newer models don't), make sure it's not covered in buildup. A dirty element can't heat water properly.

Dishwasher Won't Drain

Standing water at the bottom after a cycle indicates a drainage problem.

Check the filter: A severely clogged filter can prevent drainage.

Check the drain hose: The hose may be kinked or clogged.

Check your garbage disposal: If your dishwasher drains into your garbage disposal, run the disposal. A clogged disposal prevents the dishwasher from draining.

Check for airgap clogs: If your dishwasher has an airgap (small cylinder near the sink), it may be clogged. Remove the cap and clean it out.

If you've checked all these and water still won't drain, you may need a plumber—there could be a clog in the drain line or a faulty pump.

Maintenance Between Deep Cleans

After each use:

• Scrape dishes before loading (but don't pre-rinse—modern detergents need some food to work properly)

• Check the bottom for large food pieces

• Leave door slightly open to air dry

Weekly:

• Wipe down door seals

• Check filter for visible debris

Monthly:

• Clean the filter thoroughly

• Run a cleaning cycle with vinegar

Using Commercial Dishwasher Cleaners

If you prefer commercial products, they work well too. Products like Affresh, Finish Dishwasher Cleaner, or Cascade Dishwasher Cleaner contain stronger cleaning agents and descalers.

Follow the package directions—usually you place the tablet in the bottom of the empty dishwasher and run a hot cycle.

These are convenient and effective, especially for hard water buildup. However, the vinegar and baking soda method works just as well for most situations and costs less.

How to Prevent Dishwasher Problems

Scrape, don't rinse: Modern dishwashers and detergents work best with some food residue on dishes. Heavy soiling should be scraped off, but light residue should be left—it gives the enzymes in the detergent something to work on.

Use rinse aid: This is especially important with hard water. Rinse aid prevents water spots and helps with drying.

Use the right amount of detergent: More detergent doesn't mean cleaner dishes. Too much detergent leaves residue. Follow package directions.

Run hot water first: Before starting the dishwasher, run your kitchen faucet until the water is hot. This ensures the dishwasher fills with hot water immediately.

Run it regularly: If you don't run your dishwasher frequently, food debris in the filter can dry and harden, and seals can dry out. Even if it's not full, run it every few days.

Load properly: Don't block spray arms. Face dirty surfaces toward the center. Don't nest items.

When to Call a Professional

While most dishwasher cleaning can be DIY, sometimes you need professional help:

• Persistent odors after thorough cleaning

• Drainage problems you can't solve

• Mechanical problems (spray arms not spinning, strange noises)

• Leaking

• Not heating water properly

• Extremely old or heavily neglected dishwashers

For dishwasher repair, you'll need an appliance repair technician. For cleaning as part of a whole-home deep clean, Sparkling Saige can handle it—we clean dishwashers as part of our comprehensive kitchen cleaning services.

The Tri-Cities Dishwasher Challenge

Our hard water and the fact that many people run dishwashers daily means Tri-Cities dishwashers work hard. Regular maintenance is even more important here than in areas with softer water.

The pollen season also means more outdoor cooking and entertaining, which means more dishes and a harder-working dishwasher.

The Bottom Line

A clean dishwasher cleans dishes better, lasts longer, and doesn't smell bad. The maintenance is simple:

1. Clean the filter monthly

2. Run a vinegar cycle every 3 months

3. Wipe down seals regularly

4. Check spray arms periodically

Spend 30 minutes every few months on dishwasher maintenance, and you'll avoid expensive repairs and get sparkling dishes every time.

Need help with kitchen cleaning, including your dishwasher? Sparkling Saige offers professional deep cleaning services throughout the Tri-Cities—Johnson City, Kingsport, Bristol, and surrounding areas. We'll get your kitchen spotless from top to bottom. Contact us for a free estimate!