Smelly Dishwasher? How to Clean Smelly Dishwasher Naturally & Safely

9/16/20268 min read

blue and white cooking pot on stove
blue and white cooking pot on stove

A smelly dishwasher can make your whole kitchen feel less clean, even when the dishes look fine. The good news is that most dishwasher odors do not mean you need a strong chemical cleaner right away.

In many homes, the smell comes from trapped food, grease buildup, a dirty filter, damp seals, or residue hiding around the drain. Once you know where odors usually start, cleaning your dishwasher naturally becomes much easier.

If your dishwasher has also started leaving gritty residue, tiny food particles, or dishes that do not seem as clean as they used to, check the filter first. Those symptoms can point to the same trapped-debris problem causing the odor.

This beginner-friendly guide will walk you through how to clean a smelly dishwasher naturally, what to use, what to avoid, and how to keep the odor from coming back.

Why Does My Dishwasher Smell Bad?

A dishwasher may smell because tiny bits of food, grease, soap residue, and moisture collect in hidden areas. The most common odor spots are:

  • the dishwasher filter

  • the drain area

  • the rubber door gasket

  • the utensil basket

  • the spray arms

  • the bottom corners of the machine

Even if you rinse dishes before loading them, small particles can still build up over time. Warm, damp spaces are also perfect for stale smells.

Before reaching for a heavily scented cleaner, start with the basics: remove debris, clean the filter, wipe the seals, and run a simple cleaning cycle.

What You’ll Need

You only need a few simple supplies:

  1. warm water

  2. mild dish soap

  3. white vinegar

  4. baking soda

  5. soft microfiber cloth

  6. old toothbrush or small cleaning brush

  7. toothpick or skewer for spray-arm holes

  8. small bowl

Helpful cleaning tools:

A soft detail brush set, microfiber cloths, and a dishwasher-safe cleaning cup can make this job easier.

Shop simple dishwasher cleaning tools on Amazon

Step 1: Empty the Dishwasher Completely

Start with an empty dishwasher. Remove dishes, utensils, racks if they slide out easily, and any loose food pieces you can see.

Check the bottom of the dishwasher carefully. Sometimes a small piece of pasta, a seed, a label, or a broken bit of food packaging can sit near the drain and cause a bad smell.

This step seems simple, but it is often where the odor problem starts.

Step 2: Clean the Dishwasher Filter

The dishwasher filter should be one of the first places you check when the machine smells bad or suddenly starts leaving gritty residue or food particles on otherwise clean dishes.

First, check your dishwasher manual to confirm that your model has a removable manual-clean filter. Some machines use different filtration systems, so do not force a component that does not release easily.

For a removable filter, take out the lower rack and locate the filter near the bottom of the dishwasher, usually around the lower spray-arm area. Unlock and remove it exactly as your manufacturer directs.

Rinse away loose food and debris under running water. If residue remains and your manufacturer permits it, wash the filter with warm water and a small amount of mild dish soap. Use a soft toothbrush or soft-bristle detail brush for material caught in the mesh or grooves.

Avoid wire brushes, steel wool and rough scouring pads. Whirlpool specifically cautions that abrasive tools can damage dishwasher filters.

Before reinstalling the filter, look around the accessible filter housing and remove any loose debris you can safely reach. Then return the filter to its correct position and make sure it is fully locked. A filter that is not seated correctly can interfere with dishwasher operation.

You usually do not need vinegar, baking soda or a strong cleaner for routine filter cleaning. Physical debris is the first problem to solve; water, mild soap when permitted, and a soft brush are often enough.

Step 3: Wipe the Door Seal and Edges

The rubber gasket around the dishwasher door can collect grime, grease, and moisture. This area is easy to miss because it does not always look dirty at first glance.

Dip a microfiber cloth in warm soapy water and wipe around the door seal. Pull the folds of the gasket gently so you can clean inside the edges.

Use a toothbrush for tight corners.

Also wipe:

  • the sides of the dishwasher door

  • the bottom lip of the door

  • the detergent dispenser area

  • the place where the door meets the tub

These small areas can hold a surprising amount of residue.

Step 4: Check the Spray Arms

Spray arms help water move through the dishwasher. If the tiny holes are clogged with mineral buildup or food particles, dishes may not rinse well and odors can linger.

Remove the spray arms only if your model allows it easily. Rinse them with warm water and check the holes. If you see stuck debris, use a toothpick or skewer gently to clear the openings.

Do not use anything sharp enough to damage the spray arm.

Once the spray arms are clear, place them back securely.

Step 5: Run the Maintenance Cycle Recommended for Your Dishwasher

After physically cleaning the filter, gasket, accessible debris and spray arms, check your dishwasher manual for its recommended maintenance or cleaning cycle.

Some manufacturers permit white vinegar for occasional interior cleaning, while others recommend a dishwasher-cleaning product or a model-specific maintenance procedure. Follow the instructions for your appliance rather than assuming one DIY ingredient is appropriate for every dishwasher.

If your manufacturer specifically allows vinegar, use the amount, placement and cycle it recommends. Avoid pouring vinegar directly onto rubber seals or using it routinely without checking compatibility. Vinegar is acidic, so more is not necessarily better.

Never mix vinegar with chlorine bleach or other cleaning chemicals.

If the manufacturer permits baking soda for deodorizing, follow its instructions. Do not automatically run multiple DIY cleaning cycles simply because an odor remains. Persistent odor after the filter and accessible surfaces are clean may point to trapped debris, drainage, plumbing, or another appliance issue.

Step 6: Let the Dishwasher Air Out

After the cycle ends, open the dishwasher door slightly and let the inside dry.

Moisture is one reason smells come back quickly. Letting air circulate helps reduce that damp, stale odor.

If your dishwasher often smells musty, try leaving the door cracked open for a little while after each load, especially overnight.

What Not to Do When Cleaning a Smelly Dishwasher

Natural cleaning is helpful, but it still needs to be used carefully.

Avoid these common mistakes:

  • Do not mix vinegar and bleach.

  • Do not use harsh abrasive scrubbers on delicate parts.

  • Do not ignore the filter.

  • Do not assume fragrance means clean.

  • Do not use too much dish soap inside the dishwasher.

  • Do not use vinegar on every cycle.

  • Do not run a dishwasher with a removable filter that has not been correctly reinstalled and locked.

The most effective approach is usually simple: clean the parts where odor hides, then freshen the machine.

How Often Should You Clean Your Dishwasher Naturally?

For most households, a simple monthly cleaning is a good rhythm.

A practical schedule looks like this:

  • Inspect the filter regularly and clean it according to your dishwasher manual. Depending on the model, frequency of use and how much food reaches the filter, cleaning may range from every few weeks to much less often. Clean it sooner whenever you see trapped food, notice odor, find gritty residue on dishes, or see declining cleaning performance.

  • Wipe the door seal once a month.

  • Check the spray arms monthly.

  • Run a natural freshening cycle once a month or as needed.

  • Remove visible food debris whenever you see it.

If you cook often, have a large family, or run the dishwasher daily, you may need to clean the filter more frequently.

How to Prevent Dishwasher Smells From Coming Back

Once your dishwasher smells fresh again, a few small habits can help keep it that way.

Scrape plates before loading

You do not need to fully wash dishes before putting them in the dishwasher, but scraping off larger food pieces helps prevent buildup.

Do not overload the racks

When dishes are packed too tightly, water and detergent cannot move properly. That can leave residue behind.

Use the right detergent amount

More detergent does not always mean cleaner dishes. Too much can leave residue that contributes to odor.

Clean the filter regularly

This is the biggest habit for preventing smells. A clean filter helps the whole machine work better.

Let the inside dry

After a cycle, crack the door open for a bit if possible. A dry dishwasher is less likely to smell musty.

Should You Use a Store-Bought Dishwasher Cleaner?

Sometimes, yes.

If your dishwasher still smells after cleaning the filter, seals, spray arms, and running a natural freshening cycle, a dishwasher cleaner may help remove buildup that vinegar and baking soda cannot fully handle.

Look for options with clear ingredient information and avoid products that rely only on heavy fragrance. EPA’s Safer Choice label can help shoppers identify products made with safer chemical ingredients while still considering performance, pH, and packaging.

Is Natural Dishwasher Cleaning Enough?

For routine odor and maintenance, natural cleaning can be enough for many homes.

Cleaning with soap or detergent removes dirt and many germs from surfaces, and CDC guidance notes that in most home situations, disinfecting is usually not needed unless someone is sick or recently visited while sick.

That said, natural cleaning is not magic. If you notice sewage-like smells, standing water, drainage problems, mold growth, or repeated odors after cleaning, the issue may be plumbing, drainage, or appliance-related. In that case, it may be time to check the manual or contact a professional.

Quick Natural Dishwasher Cleaning Checklist

Use this simple checklist when your dishwasher smells bad:

  • Empty the dishwasher.

  • Remove visible food debris.

  • Clean the filter with warm soapy water.

  • Wipe the door gasket and edges.

  • Check and clear spray-arm holes.

  • Run the maintenance or cleaning cycle recommended for your dishwasher model.

  • Use vinegar, baking soda or a dishwasher cleaner only when compatible with your appliance and according to the appropriate instructions.

  • Leave the door open slightly to dry.

Most mild dishwasher odors improve once the filter and hidden residue are cleaned.

If you are building a lower-tox cleaning routine, you may also like these helpful guides:

Read Vinegar vs Baking Soda for Cleaning to understand when each ingredient works best and why they should not always be mixed.

Read Natural Cleaning Routine for Beginners if you want a simple way to start cleaning your home with fewer products.

Read Do Natural Cleaning Products Really Work? if you want realistic expectations before replacing conventional cleaners.

Read the dishwasher detergent review if you want help choosing a more eco-friendly option for everyday dishwashing.

Final Thoughts

A smelly dishwasher does not always need a harsh chemical fix. Most of the time, the best first step is to clean the places where odor hides: the filter, drain area, door seal, spray arms, and bottom corners.

Food debris and residue should be physically removed first. If additional maintenance is needed, use the cleaning cycle or compatible product recommended for your dishwasher rather than automatically adding more cleaning ingredients.

A fresher dishwasher makes the whole kitchen feel cleaner — and it is one of the easiest places to start if you are building a more natural home cleaning routine.

FAQ: How to clean a smelly Dishwasher

What is the best natural way to clean a smelly dishwasher?

Start by cleaning the filter, wiping the door seal, checking the drain area, and clearing the spray arms. Then run a hot cycle with vinegar in a dishwasher-safe bowl, followed by a short baking soda cycle if odor remains.

Can I put vinegar in my dishwasher?

Possibly, but check your dishwasher manufacturer's cleaning instructions first. Some models permit occasional vinegar cleaning, while others provide different maintenance procedures. If vinegar is approved, follow the recommended amount, placement and cycle, and never combine it with chlorine bleach.

Can baking soda remove dishwasher smells?

Baking soda may help with some lingering odors when it is compatible with the appliance, but it will not fix trapped food, a clogged filter or a drainage problem. Clean the physical source of the odor first and follow your dishwasher's maintenance instructions.

Why does my dishwasher smell even after cleaning?

The smell may come from a dirty filter, clogged drain area, trapped food, buildup in the spray arms, standing water, or a plumbing issue.

How often should I clean my dishwasher filter?

Cleaning frequency varies by dishwasher, household use and how much food reaches the filter. Check your manual and inspect the filter regularly. Clean it sooner if you notice trapped food, bad odors, gritty dishes or declining cleaning performance.