If your dishwasher smells bad, even after a full cycle, you’re not alone.
Many homeowners deal with strange odors like rotten eggs, mildew, or fish coming from their dishwashers.
These smells often stem from food particles, grease, or mold buildup in hard-to-reach areas like the filter, drain, or door gasket. But what causes that funky smell, and more importantly, how do you get rid of it?
In this guide, we break down the top reasons your dishwasher stinks, home remedies to eliminate odors, how to deep clean a smelly dishwasher, and when it’s time to replace your dishwasher.
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Shop All DishwashersReasons Your Dishwasher Smells Bad
Does your dishwasher smell like rotten eggs, fish, or even sewage? Unpleasant odors in dishwashers are more common than you might think—and they can linger long after the cycle ends. If you’re wondering, “Why does my dishwasher stink?” here are the most likely culprits:
Improper Drainage
One of the top causes of a smelly dishwasher is poor drainage. If water isn’t draining completely, it can collect at the bottom of the tub, creating the perfect environment for bacteria and mold to thrive. This stagnant water, often caused by clogged filters, blocked spray arms, or debris in the drain, leads to sour, musty smells that can even transfer to your clean dishes.
Hard Water Buildup
Live in an area with hard water? Mineral deposits like calcium and magnesium can build up inside your dishwasher over time. These deposits may give off a sulfur-like or metallic odor, similar to rotten eggs. Without regular descaling, these minerals can reduce cleaning efficiency and trap smells in the system.
Food Debris and Residue
Leftover food particles are another major reason for dishwasher odors. When filters, spray arms, or drain components collect decomposing food, it can smell like fish, sewage, or spoiled leftovers. If you notice a foul stench after each cycle, it’s a sign your dishwasher needs a deep clean.
Grease and Oil Accumulation
Grease from pots, pans, and dishes can coat the inside of your dishwasher over time. When mixed with food debris, this buildup turns rancid and creates a sour or musty odor. Regular cleaning helps break down greasy residue and keeps your appliance smelling fresh.
Mold and Mildew Growth
Dishwashers are warm and moist—ideal conditions for mold and mildew. These fungi often hide in gaskets, seals, and corners, giving off a musty or earthy smell. If you haven’t cleaned your dishwasher thoroughly in a while, mold could be the hidden reason it smells bad.
➜ Learn More: How Long Should a Dishwasher Last? Spoiler: Longer Than You Think
Common Home Remedies for Deodorizing Your Dishwasher
If your dishwasher has started to smell funky, don’t panic; there are several natural and cost-effective ways to freshen it up using ingredients you likely already have at home. Try these proven remedies to eliminate bad odors and restore that clean, neutral scent.
| Remedy | How It Works |
|---|---|
| Lemon Slices | Place wedges on the top rack and run a hot cycle. The citric acid breaks down grime and leaves a fresh scent. |
| White Vinegar | Add 1 cup to a bowl on the top rack and run a hot cycle. It dissolves grease, kills bacteria, and neutralizes odors. |
| Baking Soda | Sprinkle on the bottom of the dishwasher, let sit overnight, then run a short cycle to absorb and remove odors. |
| Dishwasher Cleaner | Use a commercial cleaner according to the label. Targets limescale, grease, and hidden residue that cause smells. |
How To Clean a Smelly Dishwasher
Here are some steps to help you clean and maintain your dishwasher for years to come:
- Clear the Drain: Remove the bottom rack and check for food or debris around the drain. Standing water breeds bacteria and smells—keep it clear to prevent buildup.
- Clean the Filter: Take out the filter and wash it with warm, soapy water. For extra deodorizing, soak it in a vinegar or baking soda solution before reinstalling.
- Wipe the Interior: Use a damp cloth to clean the walls, racks, and door. Scrub corners and gaskets with a paste of baking soda and water to remove stubborn grime.
- Unclog the Spray Arms: Remove the spray arms and rinse them under water. Use a toothpick to clear blocked holes so water can flow freely during cycles.
- Descaling Regularly: Mineral deposits from hard water can smell. Use a dishwasher-safe descaler monthly or as needed to flush out buildup.
- Clean the Gasket: Wipe the door seal with vinegar or a mild bleach solution. Replace it if it’s damaged or moldy to maintain a tight, clean seal.
- Don’t Overload: Overloading traps food and restricts water flow. Load dishes properly so every item gets clean and rinsed.
By following these tips, your dishwasher will be less prone to odd smells and last longer.
➜ Learn More: 7 Most Reliable Built-In Dishwasher Brands
Top Replacements for a Smelly Dishwasher
Here are some top-rated appliance replacements you can use if your dishwasher smells bad:
Bosch 300 Series 24” Stainless Steel Front Control Built In Dishwasher
Shop Built In Bosch Dishwasher
Bosch dishwashers are perfect for those who like convenience and a quiet home. With its remarkably quiet operation at 46 dBA, you can run this dishwasher at any time of the day without it being a nuisance to your home or those living there.
And, thanks to its other features, like the AquaStop Plus, which detects and stops leaks, the built-in water softener, and the PrecisionWash, which scans your dishes as the cycle runs to ensure optimal cleanliness, this machine can tackle any job while keeping your kitchen safe from any water damage.
KitchenAid 24” Stainless Steel with Printshield Built In Dishwasher
Shop this KitchenAid Stainless Steel Dishwasher
KitchenAid dishwashers are great at tackling washing jobs with heavy dirt and grime. Using expert cleaning technology, like the triple filtration system, this appliance can remove food particles during the wash and rinse cycles, ensuring only clean water circulates through the wash arms.
Thanks to its adjustable middle rack, this dishwasher also has the flexibility to accommodate larger items, like platters, blenders, and pitchers. Finally, thanks to its smudge-resistant finish and quiet operation, this appliance is great for those who have small children. Like many KitchenAid dishwashers, this one is also ENERGY STAR-certified.
GE 24” Stainless Steel Portable Dishwasher
GE dishwashers come jam-packed with features to ensure your dishes get as clean as possible. For instance, with its autosense cycle, a beam of light can measure the soil levels and water temperature to make the right adjustments for your dishes' needs. Have some trouble with food particles? This appliance comes with a stainless-steel blade that pulverizes food, so it doesn’t get stuck in your drain or clog your spray arms.
Lastly, this appliance has expert sanitizing options, which use a high-temperature rinse to sanitize your dishes and reduce their bacteria by 99.99%. That makes it perfect for dishes that require sanitizing, like baby bottles. Like many GE dishwashers, this one is also ENERGY STAR-certified.
LG 24" PrintProof Stainless Steel Dishwasher
Shop LG 24" Stainless Steel Dishwasher
This LG dishwasher impresses with quiet yet powerful performance, leaving dishes sparkling clean without the noise. Its PrintProof™ stainless finish keeps smudges at bay, making it perfect for busy households.
With multiple wash cycles and a sleek front control panel, it's easy to use and efficient. Whether you're tackling pots and pans or delicate glassware, it handles every load with care and consistency.
Frigidaire Gallery 24" Smudge-Proof Stainless Steel Dishwasher
Shop Frigidaire Gallery 24" Built In Dishwasher
Designed for modern kitchens, this Frigidaire Gallery dishwasher delivers thorough cleaning power with every cycle. The top control design adds a streamlined look, while its Smudge-Proof™ finish helps it stay clean on the outside as well.
It’s equipped with smart features like a powerful spray arm and customizable racks to handle big loads with ease. Perfect for families who want fast, spotless results without the extra scrubbing.
Maytag 24" Fingerprint Resistant Stainless Steel Dishwasher
Shop Maytag 24" Built In Dishwasher
Built tough and made to perform, this Maytag dishwasher tackles tough messes with high-pressure jets and powerful drying. The fingerprint-resistant stainless exterior stays sleek, while the interior delivers consistent, dependable results.
With durable racks and a reliable motor, it’s designed to take on heavy-duty loads night after night. A solid pick for households that expect hard-working appliances that can keep up.
➜ Learn More: How Much Is a New Dishwasher Going to Cost You? Price Ranges for Every Budget
Say Goodbye to Dishwasher Odors for Good
A smelly dishwasher doesn’t mean you need a new one, but it does mean it’s time for a deep clean or a little maintenance.
With the right habits and occasional remedies like vinegar rinses and filter cleanings, you can keep your dishwasher running fresh and odor-free.
And if your current model just isn’t cutting it anymore, John’s Appliance & Bedding is here to help. Visit one of our South Florida showrooms to explore top-rated dishwashers and get expert advice tailored to your home and budget.
Frequently Asked Questions
To eliminate bad smells, start by removing any food debris from the filter, drain, and spray arms. Then, place a cup of white vinegar on the top rack and run a hot water cycle. This helps neutralize odors, dissolve buildup, and disinfect the interior.
A rotten egg smell usually indicates trapped food particles or sulfur bacteria in the drain or filter. Remove the filter, clean it thoroughly, and check the drain for clogs. Running a hot cycle with vinegar afterward can help flush away any lingering odor.
Clean your dishwasher filter at least once a month to prevent odor and ensure optimal performance. If you use your dishwasher frequently or have hard water, consider cleaning it more often to avoid buildup and bad smells.
If you're in South Florida, visit John’s Appliance & Bedding. We offer a wide selection of high-quality dishwashers to match your kitchen style and budget. Stop by one of our convenient locations in South Daytona, New Smyrna Beach, Orange City, or Palm Coast.
Yes—hard water can leave behind mineral deposits that create a sulfur-like or metallic odor. Descaling your dishwasher monthly with a vinegar rinse or commercial descaler can help remove buildup and keep smells at bay.
Absolutely. Commercial dishwasher cleaners are designed to break down grease, limescale, and trapped food debris that contribute to odor. Use one monthly or as needed to maintain a fresh-smelling appliance.
Routine maintenance is key. Always scrape excess food off dishes before loading, clean the filter regularly, run hot water cycles with vinegar or baking soda, and avoid overloading the racks. This keeps odors from developing and ensures your dishwasher stays clean and efficient.
Why Trust John’s Appliance & Bedding?
Our family-owned and operated store started with a pick-up truck and a dream. When John Hinton Jr. first opened his storefront in 1972, he never envisioned that over the next 50 years, he would outgrow his flagship location and need to open several other locations. However, that’s just what he did.
Thanks to John and his team, John’s Appliance & Bedding has been able to provide our customers with the best appliances, mattresses, and cabinet solutions in South Florida. We view our customers as an extension of our family and seek to provide the best service and expertise that we always have.
Shop Dishwashers at John’s Appliance & Bedding
At John’s Appliance & Bedding, we provide high-quality, name-brand products for the best possible price. Shop dishwashers online or visit one of our four South Florida showrooms and experience world-class customer service. Our friendly product experts are always happy to help you find a dishwasher — whether you call us, use our online chat feature, or visit us in person.
➜ Learn More: Our Guide to the GE Profile Dishwasher Line