Why Does My Dishwasher Smell? 4 Common Causes and Solutions

If you're noticing an unpleasant odor coming from your dishwasher, you're not alone. Many people experience this issue, and it can be caused by a variety of factors.

One possible cause of a smelly dishwasher is a buildup of food particles and grease. Over time, these can accumulate in the dishwasher's interior and create an unpleasant odor.

Another potential culprit is a clogged or dirty filter, which can prevent water from draining properly and lead to stagnant water and a foul smell. Additionally, hard water can leave mineral deposits in your dishwasher, which can contribute to odor and reduce its cleaning effectiveness.

To address these issues, it's important to keep your dishwasher clean and well-maintained.

Regularly cleaning the interior with a solution of vinegar and water can help remove buildup and neutralize odors. You should also clean the filter and spray arms periodically to ensure proper water flow and drainage.

Finally, using a dishwasher cleaner or descaler can help remove mineral deposits and keep your dishwasher smelling fresh.

4 Reasons Why Your Dishwasher Smells Bad

If you've noticed a foul smell coming from your dishwasher, there are a few reasons why this might be happening. In this section, we'll explore some of the most common culprits of dishwasher odor and what you can do to fix them.

1. Food Particles and Buildup

One of the most common reasons for a smelly dishwasher is the buildup of food particles and other debris. Over time, these particles can accumulate in the dishwasher's filter, spray arms, and other components, leading to a musty odor.

To prevent this, it's important to regularly clean your dishwasher and remove any food debris after each cycle.

2. Bacteria and Mold

Dishwashers provide a warm, moist environment that is ideal for the growth of bacteria and mold. If you notice a foul odor coming from your dishwasher, it's possible that these microorganisms are to blame.

To combat this, try running your dishwasher on the hottest cycle possible and using a dishwasher cleaner to remove any mold or bacteria.

3. Hard Water and Mineral Buildup

If you live in an area with hard water, mineral buildup can be a common cause of dishwasher odor. Over time, minerals like calcium and magnesium can accumulate in the dishwasher's spray arms and other components, leading to a musty smell.

To prevent this, consider using a water softener or adding a dishwasher cleaner that is specifically designed to remove mineral buildup.

4. Grease and Foul Smells

Grease and other organic materials can also contribute to a smelly dishwasher. Over time, these materials can accumulate in the dishwasher's filter and other components, leading to a foul odor.

To prevent this, make sure to regularly clean your dishwasher and remove any grease or food debris after each cycle.

Effective Home Remedies for Deodorizing Your Dishwasher

If you've noticed a foul odor coming from your dishwasher, don't worry, you're not alone. Many homeowners have experienced this issue, but luckily, there are several home remedies that can help deodorize your dishwasher.

1. Sanitize with Vinegar

One of the most effective ways to clean and deodorize your dishwasher is by using white vinegar. Vinegar is a natural disinfectant and can help remove any built-up grime or bacteria in your dishwasher.

To use vinegar as a dishwasher cleaner, simply pour two cups of white vinegar into a dishwasher-safe bowl and place it on the bottom rack of your empty dishwasher. Then, run a hot cycle with an air-dry or energy-saving dry option.

The vinegar will mix with the wash water to help neutralize odors and clean your dishwasher.

2. Try Lemon Freshness

Another natural way to deodorize your dishwasher is by using lemons. The citric acid in lemons can help break down any food particles or grease that may be causing the odor.

To use lemons as a dishwasher deodorizer, simply cut a lemon into quarters and place them in a dishwasher-safe bowl on the top rack of your empty dishwasher. Then, run a hot cycle with an air-dry or energy-saving dry option.

The lemon scent will leave your dishwasher smelling fresh and clean.

3. Use Baking Soda

Baking soda is another natural ingredient that can help deodorize your dishwasher. Baking soda is a great deodorizer because it can absorb odors.

To use baking soda as a dishwasher cleaner, simply sprinkle one cup of baking soda on the bottom of your empty dishwasher and run a hot cycle with an air-dry or energy-saving dry option.

The baking soda will help absorb any odors and leave your dishwasher smelling fresh.

4. Try Dishwasher Cleaner

If you've tried the natural remedies and your dishwasher still smells, you may want to try a dishwasher cleaner. Dishwasher cleaners are designed to remove any built-up grime or bacteria that may be causing the odor.

To use a dishwasher cleaner, simply follow the instructions on the package. Most dishwasher cleaners require you to run a hot cycle with the cleaner in the detergent dispenser.

How To Clean a Smelly Dishwasher

If your dishwasher is emitting a foul odor, it is likely due to the accumulation of food particles, grease, and mold and mildew. Cleaning your dishwasher regularly can help prevent these issues and keep your appliance running smoothly. Here are the steps you need to follow to clean a smelly dishwasher.

Supplies

Before beginning the cleaning process, make sure you have the following supplies:

• White vinegar
• Baking soda
• Bleach (optional)
• Dishwasher cleaner (optional)
• Brush or sponge
• Cloths

Tools

You will also need the following tools:

• Dishwasher-safe bowl
• Toothbrush or other small brush
• Screwdriver (if necessary)

Step 1: Empty the Dishwasher

Remove all dishes and utensils from the dishwasher. Use a damp cloth to wipe down the interior of the dishwasher and clear out any debris on the floor and sides.

Step 2: Remove and Clean the Filter

The dishwasher filter is responsible for trapping food particles and preventing them from clogging the drain. Over time, the filter can become clogged and emit a foul odor. Follow these steps to clean the dishwasher filter:

1. Locate the filter at the bottom of the dishwasher.
2. Remove the filter according to the manufacturer's instructions.
3. Rinse the filter under hot water to remove any debris.
4. Use a toothbrush or other small brush to scrub away any remaining food particles.
5. Reinstall the filter according to the manufacturer's instructions.

Step 3: Clean the Dishwasher Interior

Pour 2 cups of white vinegar in a dishwasher-safe bowl and place the bowl on the bottom rack of your empty dishwasher. Select a dishwasher cycle with an air-dry or energy-saving dry option and press start.

During the cycle, the vinegar will mix with the wash water to help neutralize odors and clean your dishwasher.

Alternatively, you can use baking soda instead of vinegar. Sprinkle 1 cup of baking soda on the bottom of your dishwasher and run a hot water cycle. This will help remove any lingering odors and clean the interior of your dishwasher.

Step 4: Clean the Gasket Seals

The gasket seals around the dishwasher door can also accumulate mold and mildew over time. Use a cloth or sponge to clean the gasket seals with a solution of equal parts water and vinegar. This will help remove any mold and mildew and prevent future growth.

Step 5: Schedule a Service with a Licensed Technician

If your dishwasher continues to emit a foul odor after following these steps, it may be time to schedule a service with a licensed technician. They can inspect your appliance for any underlying issues and perform any necessary maintenance.

Related: How To Install a Dishwasher: A Step-by-Step Guide

How to Avoid a Smelly Dishwasher

Nobody wants a smelly dishwasher, but luckily there are some simple steps you can take to prevent it from happening. By following these tips, you can keep your dishwasher smelling fresh and clean.

Pre-Rinse Your Dishes

One of the main causes of a smelly dishwasher is food particles that are left behind on your dishes. To prevent this, make sure you rinse your dishes before placing them in the dishwasher. This will help to remove any food debris and prevent it from building up in your dishwasher.

Ensure Proper Drainage

Another common cause of dishwasher odors is poor drainage. If your dishwasher is not draining properly, it can lead to standing water and a buildup of bacteria.

To avoid this, make sure your dishwasher's drain is clear and free of any debris. Also, check the drain hose for any kinks or clogs that may be preventing proper drainage.

Clean Your Dishwasher Regularly

Regular cleaning is essential to keeping your dishwasher smelling fresh. You should clean your dishwasher at least once a month to prevent the buildup of food particles, grease, and other debris.

You can use a dishwasher cleaner or simply run an empty cycle with vinegar or baking soda to help remove any buildup.

Practice Regular Maintenance

In addition to regular cleaning, it's important to perform regular maintenance on your dishwasher. This includes checking the dishwasher's spray arms, filters, and seals for any signs of damage or wear.

If you notice any issues, be sure to address them right away to prevent further damage.

Also read: What to Look for When Buying a Dishwasher

Top 3 Replacements for a Smelly Dishwasher

If you've tried all the DIY methods to get rid of the smell in your dishwasher and it still persists, it might be time to consider replacing your appliance. Here are some top-rated dishwasher replacements that can help eliminate the bad odors:

1. Forno Alta Qualita 24″ Stainless Steel Pro-Style Built-In Dishwasher FDWBI8067-24S

The Forno Alta Qualita dishwasher melds Italian design with functionality, providing a spacious stainless steel interior and robust cleaning power.

Advanced wash cycles ensure thorough cleansing, while the quiet operation means your kitchen stays peaceful. This pro-style built-in dishwasher doesn’t just get the job done; it adds a touch of elegance to your home with its sleek finish.

2. ZLINE Autograph Edition 18 in. Dishwasher in Stainless Steel with Gold Handle, DWVZ-304-18-G

Compact efficiency meets luxury with the ZLINE Autograph Edition dishwasher. Its 18-inch frame is ideal for smaller spaces or as a second dishwasher in large homes.

The standout feature is the chic gold handle that pops against the stainless steel, not to mention the customized wash cycles that cater to all types of dishes, ensuring they come out sparkling.

3. ZLINE Autograph Series 24 inch Tall Dishwasher In Black Stainless Steel with Gold Handle DWVZ-BS-24-G

The ZLINE Autograph Series dishwasher boasts a striking black stainless steel exterior complemented by an opulent gold handle, perfect for the modern kitchen that appreciates a hint of glamour.

Inside, the dishwasher excels with powerful wash settings that accommodate even the heaviest soiled pots and pans. The dishwasher is also built for durability, ensuring a long-lasting addition to your appliance collection.

Also read our guide: A Comprehensive Guide to Dishwasher Sizes

Get More Dishwasher Tips

Now that you know why your dishwasher smells, it's important to keep it clean and well-maintained to prevent future odors.

Here are some additional tips to help you keep your dishwasher in top shape:

Maintenance

Regular maintenance is key to keeping your dishwasher running smoothly. Here are some maintenance tips to keep in mind:

• Check the dishwasher's spray arms for clogs or damage. If they're dirty, clean them with a toothbrush or a pipe cleaner.
• Inspect the dishwasher's door gasket for cracks or damage. If it's damaged, it can cause leaks and odors.
• Clean the dishwasher's filter regularly to prevent clogs and odors.

Cleaning

Keeping your dishwasher clean is essential for preventing odors. Here are some cleaning tips to help you maintain a fresh-smelling dishwasher:

• Clean the dishwasher's interior with a mixture of baking soda and water. Scrub the interior with a soft brush, then rinse with water.
• Run a cycle with a dishwasher cleaner to remove any buildup or odors.
• Clean the dishwasher's exterior with a damp cloth and mild detergent.

Cycle

Running the right cycle can help prevent odors and keep your dishes clean. Here are some tips to help you choose the right cycle:

• Use the "sanitize" cycle to kill bacteria and prevent odors.
• Use the "heavy-duty" cycle for heavily soiled dishes.
• Use the "rinse-only" cycle if you're not running a full load of dishes.

Dishwasher Not Draining

If your dishwasher isn't draining properly, it can cause odors and other issues. Here are some tips to help you troubleshoot:

• Check the dishwasher's drain hose for clogs or kinks. If it's clogged, use a plumber's snake to clear the blockage.
• Check the dishwasher's air gap for clogs. If it's clogged, clean it out with a toothbrush.
• Check the dishwasher's drain pump for damage. If it's damaged, it may need to be replaced.

Related read: How to Clean Your Dishwasher Filter: A Step-by-Step Guide

Wrap Up

To freshen up your kitchen and get rid of dishwasher odors, it's crucial to address the buildup of food, mineral deposits, and bacteria. Regular cleaning with household items like vinegar can help eliminate these smells. Keep your dishwasher's filter and arms clean to prevent odors and ensure it's working properly.

If unpleasant smells persist even after a good clean, the problem might be more serious, and a professional could be needed. For those looking to upgrade, Home Appliance Paradise features top-of-the-line dishwashers that combine sleek design with powerful cleaning technology.

Frequently Asked Questions

Why does my dishwasher emit a sewage-like odor?

A sewage-like odor from your dishwasher can be caused by a clogged drain line. Food particles and debris can accumulate in the drain line, leading to standing water and a foul smell.

What causes a rotten egg smell in my dishwasher?

A rotten egg smell in your dishwasher can be caused by sulfur in your water supply. This can react with bacteria in the dishwasher and create a foul odor.

How can I effectively eliminate odors from my dishwasher?

To eliminate odors from your dishwasher, try running a cycle with vinegar or baking soda.

You can also try using a dishwasher cleaner or deodorizer.

It's important to regularly clean your dishwasher to prevent odors from developing in the first place.

What should I do if my dishwasher has a persistent cheese-like smell?

A persistent cheese-like smell in your dishwasher can be caused by a buildup of food particles and grease.

You can try cleaning the dishwasher with a mixture of vinegar and baking soda, or using a dishwasher cleaner.

It's also important to regularly clean the dishwasher and scrape food particles off dishes before loading them into the dishwasher.

How can I prevent my dishwasher from developing a foul smell?

To prevent your dishwasher from developing a foul smell, make sure to scrape food particles off dishes before loading them into the dishwasher.

Run the dishwasher on the hottest cycle possible, and use a dishwasher cleaner or deodorizer regularly.

You can also try using a rinse aid to prevent buildup of food particles and grease.

What steps can I take to clean a smelly dishwasher drain hose?

To clean a smelly dishwasher drain hose, first disconnect the hose from the sink or garbage disposal.

Use a long, flexible brush to clean out any debris or buildup inside the hose.

You can also try running hot water through the hose to flush out any remaining debris.

Reconnect the hose and run a cycle with vinegar or baking soda to eliminate any remaining odors.