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Does the dishwasher smell bad? Know the causes and solutions for bad odors

August 29, 2026|By Shahid

Introduction: Why do dishwashers smell bad?

Having a dishwasher in the home kitchen has now become common for almost everyone. But when you find that your dishwasher smells like rotten eggs or fish, the whole kitchen environment becomes unpleasant. Although this problem is common, many people do not know about its causes and solutions. Let’s find out why this happens and how to get rid of this odor.

Does the dishwasher smell bad? Know the causes and solutions for bad odors

Main causes of dishwasher odors

Dishwasher odors can have several causes. They are discussed in detail below:

1. Accumulation of food residues

The most common cause is the accumulation of small pieces of food inside the dishwasher. Residues from food, especially fatty foods, fish, eggs, or milk, are not easily cleaned. These residues decompose over time and cause foul odors.

For example, if you often put oily pans or frying pans in the dishwasher, the oily residue can accumulate in various parts of the dishwasher and cause odors.

2. Drain or filter problems

If the drain or filter at the bottom of the dishwasher is not clean, food particles can build up and cause odors. Many times if the filter is not cleaned properly, bacteria grows there and causes an odor.

Also, if the drain gets blocked for some reason or not enough water can get out, it can also cause an odor.

3. Dishwasher seal or gasket problems

If the rubber seal or gasket around the dishwasher door is wet or not clean, bacteria can grow there. These bacteria can cause an odor. Sometimes the seal is damaged but it can still smell bad.

4. Detergent problem

Many times, if the detergent is of poor quality or if the amount is too much, foam forms inside the dishwasher. This foam does not wash off easily and can develop odors over time. Also, using some cheap detergents can cause buildup and odors inside the dishwasher.

5. Water drainage problem

If the water in the dishwasher is not drained properly, bacteria can grow in the water that collects inside. These bacteria can cause an odor. Many times water drainage is interrupted due to pipe or drain problems.

6. Dirt buildup inside the dishwasher

If dirt accumulates in the spray arm, spray nozzle, or other parts inside the dishwasher, it can cause bad odors. If not cleaned regularly, food particles accumulate in these parts and bacteria are formed.

Effective Ways to Eliminate Dishwasher Odors

Now let’s find out how to get rid of this odor. Below are some effective methods:

1. Regular cleaning

The most effective way is to clean the dishwasher regularly. The entire dishwasher should be cleaned thoroughly at least once a month. Below are the cleaning steps:

  • Cleaning the filter: First, open the bottom filter of the dishwasher and clean it thoroughly. The filter is usually divided into two to three parts. Clean each part separately.
  • Cleaning the spray arms: Unscrew the spray arms and check each nozzle for food particles. If so, clear it.
  • Cleaning the drain: Use a brush or old toothbrush to clean the drain. If there is any dirt inside the drain, remove it.
  • Washing the inside of the dishwasher: Wipe the inside of the dishwasher with a clean cloth or sponge. Clean especially well the seals or gaskets around the door.

2. Using vinegar

Vinegar is a natural disinfectant. Vinegar is effective in removing dishwasher odors. Below are the methods of using vinegar:

  1. Pour a cup of white vinegar into a clean cup.
  2. Place the cup in the middle of the top rack of the dishwasher.
  3. Run the dishwasher on empty. Select the hottest water cycle.
  4. Open the dishwasher and wipe out the inside after the entire cycle has finished.

3. Using baking soda

Baking soda is also effective in eliminating odors. Here is how to use it:

  1. Spread a cup of baking soda in the bottom of the dishwasher.
  2. Run the dishwasher on empty. Select the hottest water cycle.
  3. Open the dishwasher and wipe out the inside after the entire cycle has finished.

4. Using dishwasher cleaner

There are different brands of dishwasher cleaner available in the market. These cleaners are specially formulated to clean dishwashers. Regular use deodorizes the dishwasher and keeps the interior clean.

Some popular dishwasher cleaners are:

  • Finish Dishwasher Cleaner
  • Lemi Shine Dishwasher Cleaner
  • Affresh Dishwasher Cleaner

5. Changing the detergent

If you are using cheap or less effective detergent, change it. There are various high-quality detergents available in the market that help keep the interior of the dishwasher clean.

Some popular detergents are:

  • Finish Quantum
  • Cascade Platinum
  • Jet-Dry Rinse Aid

6. Solving drainage problems

If the dishwasher has drainage issues, it needs to be addressed. Below are some solutions:

  • Checking the drain: Check if the drain is blocked by food particles or other objects. If there is, remove it.
  • Checking the pipe: If the drain pipe is bent for some reason or blocked by an object, straighten or clean it.
  • Checking the water pressure: If the water pressure is low, there may be a problem with the water source or pipes. In that case, take the help of a plumber.

How to prevent dishwasher odors

Once the stench is gone, some preventative measures should be taken to prevent it from reoccurring. Below are some ways:

1. Regular cleaning

Dishwasher should be cleaned regularly. The entire dishwasher should be cleaned at least once a month. Also, filter and drain should be cleaned after each use.

2. Cleaning up food residue

Clean dishes thoroughly before putting them in the dishwasher. Remove leftovers from food, especially fatty foods, fish, or eggs. Also, don’t put too much food on plates or dishes.

3. Using the right detergent

Use high-quality detergent. Using cheap detergents can build up inside the dishwasher and cause odors. Besides, the amount of detergent should also be correct. Using too much detergent may cause foaming.

4. Dry thoroughly after using the dishwasher

After using the dishwasher, leave the door open for a while to allow the interior parts to dry thoroughly. Also, clean the spray arms regularly so that no food particles accumulate.

5. Regular maintenance

Dishwashers should be regularly maintained. If any part is damaged, replace it promptly. Especially check the door seal or gasket thoroughly and replace if necessary.

Common Mistakes to Eliminate Dishwasher Odors

Many people make some common mistakes when trying to remove dishwasher odors. It is these mistakes that mainly worsen the problem of bad odors. Below are the errors and their effective solutions:

1. Using only detergent

Many people think that only using detergent will get the dishwasher clean. But actually the detergent only cleans the dishes, not the dishwasher’s interior. As a result, over time, bacteria and dirt accumulate inside the dishwasher, causing odors. So it is very important to use dishwasher cleaner, vinegar, or baking soda on a regular basis.

2. Not clearing the filter

Although the filter is an important part of the dishwasher, many people do not consider it important to clean it. A buildup of food particles in the filter causes bacteria to grow and cause foul odors. So the filter should be opened and cleaned thoroughly at least once a month. You can use warm water and mild detergent for cleaning.

3. Not cleaning the drain

If the drain is not cleaned, food particles accumulate and bacteria grow. As a result, an odor problem arises. Drains should be cleaned once every month. You can use drain cleaner or a mixture of vinegar and baking soda for cleaning.

4. Do not run the dishwasher empty

Many people think that it is not necessary to run the dishwasher empty. But actually emptying the dishwasher cleans the insides better. The dishwasher should be run empty at least once a month. Besides, the dishwasher should be dried thoroughly after use so that there is no moisture inside.

5. Using extra detergent

Many people think that using more detergent will clean the dishes better. But using too much detergent can leave residue inside the dishwasher and cause odors. Therefore detergent should be used as per manufacturer’s instructions.

6. Always keep the dishwasher door closed

Many people always keep the dishwasher door closed to prevent dust from entering. But this is a misconception. The dishwasher door should be left open for a while after use to allow the moisture inside to escape. Also, keeping the door open helps the insides dry better.

What ingredients should be used to remove dishwasher odors?

A variety of natural ingredients can be used to remove dishwasher odors. Many people prefer these materials as they are readily available and eco-friendly. Some of the functional components are discussed in detail below:

Vinegar

Vinegar acts as a natural disinfectant. Vinegar can be used to deodorize dishwashers. To use, place a cup of white vinegar on top of the dishwasher and run an empty cycle. It cleans the inside of the dishwasher and helps remove odors.

Baking soda

Baking soda acts as a natural cleaner and deodorizer. Baking soda can be used to deodorize dishwashers. To use, sprinkle one cup of baking soda over the top of the dishwasher and run an empty cycle. It cleans the inside of the dishwasher and helps remove odors.

Lemon juice

Lemon juice acts as a natural disinfectant and deodorizer. Lemon juice can be used to deodorize dishwashers. To use, squeeze the juice of two to three lemons over the top of the dishwasher and run an empty cycle. It cleans and deodorizes the inside of the dishwasher.

Dishwasher Cleaner

There are different brands of dishwasher cleaner available in the market. These cleaners are specially formulated to clean the inside of the dishwasher. Regular use of dishwasher cleaner removes odors from the dishwasher and increases its performance.

Which brand of cleaner is best for removing dishwasher odors?

There are different brands of dishwasher cleaner available in the market. However, not all cleaners are equally effective. Some brands of cleaners are particularly effective at deodorizing dishwashers and cleaning the interior. Below is a comparison of some popular brands of cleaners:

BrandFeaturesPrice (Approx)Convenience of Use
Finish Dishwasher CleanerDeeply cleans the inside of the dishwasher, removing odors and removing caked-on food residue.$10–$15 USDEasy to use and fast working.
Ecover Dishwasher CleanerMade with eco-friendly ingredients, eliminates odors and improves dishwasher performance.$12–$18 USDNot harmful to the environment as it is made of organic material.
Sommer Dishwasher CleanerDeeply cleans the inside of the dishwasher and helps eliminate odors.$8–$12 USDAffordable and readily available.
Cif Dishwasher CleanerCleans the inside of the dishwasher and helps remove odors.$5–$10 USDCheap in price and easily available.

Which is more effective at removing dishwasher odors: Vinegar or dishwasher cleaner?

Vinegar and dishwasher cleaner are both effective at removing dishwasher odors. But which of the two is more efficient depends on the usage and condition of the dishwasher. Below is a comparison of vinegar and dishwasher cleaner:

  • Vinegar:
    • Eco-friendly as it is a natural material.
    • Affordable and readily available.
    • Cleans the inside of the dishwasher and helps remove odors.
    • Effective results are rarely obtained.
  • Dishwasher Cleaner:
    • Specially formulated for dishwasher cleaning.
    • Deeply cleans the interior of the dishwasher.
    • Provides long-term effectiveness.
    • Different brands of cleaners offer different benefits.

Typically, vinegar is easy to use and fast acting, but dishwasher cleaner provides a long-term solution. So if the odor problem is more severe, dishwasher cleaner should be used. And if you have a regular cleaning habit, then you can use vinegar.

What should you avoid to get rid of dishwasher odors?

Some ingredients should be avoided when deodorizing dishwashers. These ingredients can damage the dishwasher and add to the odor. Some of the elements are discussed below:

Bleach

Bleach is a powerful disinfectant but is harmful to dishwashers. Using bleach can corrode the inside of the dishwasher and increase odors. Therefore, bleach should never be used for cleaning dishwashers.

Extra hot water

Using excessively hot water can corrode the inside of the dishwasher and increase odors. So instead of hot water for cleaning the dishwasher, you should use lukewarm water.

Hard soap or detergent

Using harsh soaps or extra-thick detergents can leave residue inside the dishwasher and cause odors. Therefore, liquid detergent should always be used and should be used according to the amount recommended by the manufacturer.

When should the dishwasher be cleaned to remove odors?

Timely cleaning is very important to eliminate dishwasher odors. Regular cleaning improves dishwasher performance and eliminates odors. Some important periods are discussed below:

Deep cleaning once per month

Dishwashers should be deep cleaned at least once a month to eliminate odors. Dishwasher cleaner, vinegar, or baking soda can be used for this. Deep cleaning cleans the inside of the dishwasher and removes odors.

Regular cleaning every week

Dishwashers should be cleaned regularly every week to eliminate odors. For this, the filter, drain, and the inside of the dishwasher must be cleaned. Regular cleaning reduces odor problems and increases dishwasher performance.

After cleaning up food residue

After cleaning food residue, the dishwasher should be cleaned thoroughly before use. For this reason, the inside of the dishwasher must be cleaned and the filter must be cleaned.

About the Author

Shahid · Product Research Writer

Hi I am an Engineer I have passed my diploma in Engineering in 2007. Academically I have studied about home appliances and various motors and machineries. In 2012 I have started my blogging and learned a lot of things about home appliances especially washing appliances, washing and cleaning related products, and eequipments. In 2019 I have started my blog https://appliancesky.com to provide my research and experience with my fan and followers.

Research Methodology: This review is based on publicly available specifications, verified buyer reviews, expert publications, and overall market reputation.
Affiliate Disclosure: ApplianceSky participates in the Amazon Associates Program. We may earn a small commission when you purchase through our links at no extra cost to you.

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