No one wants to open their dishwasher and be greeted by a foul smell, especially one that resembles rotten eggs. This foul stench is not only unpleasant, but it can also impact the cleanliness of your dishes. Fortunately, it’s a common problem that can be easily fixed.
In this blog post, we’ll explain why your dishwasher might smell like eggs and offer six effective solutions to eliminate the odor for good. So, let’s get started on re-scenting your dishwasher!
Why Does Your Dishwasher Smell Like Eggs?
There might be several reasons behind your dishwasher smells like eggs. Here are some of the causes of the bad smell:
1. Stagnant Water
Stagnant water is a common cause of a dishwasher smelling like eggs. When water sits in the dishwasher for an extended period, it can become a breeding ground for bacteria and mold, which produce foul odors.
This can happen if the dishwasher isn’t used frequently or if there’s an issue with the dishwasher’s draining system. In either case, stagnant water creates an environment conducive to the growth of odor-causing microorganisms.
2. Trapped Food Particles
Food particles can easily become trapped in various parts of your dishwasher, such as the filter, spray arms, or door seals. As these particles decompose, they release unpleasant odors, including the characteristic rotten egg smell.
If not removed promptly, these trapped particles can contribute to bacteria and mold growth, exacerbating the odor problem.
3. Bacteria and Mold Growth
Bacteria and mold thrive in damp, dark environments, making your dishwasher an ideal habitat. When bacteria and mold grow inside the dishwasher, they produce a range of foul-smelling compounds, including the rotten egg odor of hydrogen sulfide gas.
These microorganisms can multiply and lead to persistent, unpleasant smells if not addressed.
4. Sulfur Buildup
Sulfur compounds in water and certain foods can sometimes build up inside your dishwasher. When these compounds break down, they produce hydrogen sulfide gas, which smells like rotten eggs.
This can occur when sulfur-rich foods, such as eggs, garlic, and onions, are washed in the dishwasher or when the dishwasher is connected to a water supply with high sulfur content.
5. Sewer Gas Leaks
Sewer gas leaks can cause your dishwasher to smell like rotten eggs. The sewer gas, which contains hydrogen sulfide, can enter your dishwasher through the drain hose if there’s a problem with the plumbing system, such as a blocked vent pipe or a malfunctioning drain trap.
When this happens, the unpleasant smell can permeate the dishwasher and the surrounding area.
6. Drainage Issues
Drainage issues can also contribute to a dishwasher smelling like eggs. If the dishwasher isn’t draining properly, water may accumulate at the bottom of the unit, leading to stagnant water and trapped food particles.
This creates a conducive environment for bacteria, mold, and sulfur buildup, contributing to the rotten egg smell. Poor drainage can result from a clogged drain hose, a blocked air gap, or a malfunctioning drain pump.
How to Fix a Dishwasher That Smells Like Eggs
A smelly dishwasher might seem like a big issue; however, some solutions could help you get your dishes clean and grease-free without the foul odor.
1. Clean the Dishwasher Filter
Cleaning the dishwasher filter is essential for maintaining a fresh-smelling dishwasher. The filter catches food particles and debris, preventing them from clogging the drain. Over time, these trapped particles can decompose and produce unpleasant odors.
To clean the filter:
- Remove it from the dishwasher and rinse it thoroughly under warm water.
- Use a soft brush dipped in white vinegar to remove any stubborn debris, and replace the filter once it’s clean.
- If you notice persistent odors, try to clean the filter every one to two months or more.
In addition to cleaning the filter, wiping it down with a cloth dipped in soapy water in other areas of the dishwasher where food particles can accumulate is essential. This includes the spray arms, door seals, and the area around the filter.
2. Use a Dishwasher Cleaner
Commercial dishwasher cleaners are specifically designed to break down grease, mineral deposits, and odor-causing residues. These cleaners are easy to use and highly effective at removing the source of unpleasant smells.
To use a dishwasher cleaner, follow the manufacturer’s instructions, which typically involve running an empty dishwasher cycle with the cleaner. Using a dishwasher cleaner once a month or as needed to maintain a fresh-smelling appliance is recommended.
In addition to using a dishwasher cleaner, clean the dishwasher’s interior regularly. Wiping down the walls, racks, and door with a damp cloth or sponge can help remove any lingering debris contributing to the rotten egg smell.
3. Run a Vinegar or Baking Soda Cycle
Running a vinegar or baking soda cycle in your dishwasher is an excellent and natural approach to removing undesirable odors. Both vinegar and baking soda have odor-neutralizing properties and can help remove mineral buildup and bacteria.
Pour one cup of white vinegar into the bottom of an empty dishwasher and start a standard wash cycle. To make a baking soda cycle, sprinkle one cup of baking soda on the bottom of an empty dishwasher and run a brief, hot water cycle.
You can also use a combination of vinegar and baking soda for a more thorough cleaning. Start by running a vinegar cycle and then follow it with a baking soda cycle. This dual approach will help neutralize odors and leave your dishwasher smelling fresh.
4. Check and Clean the Drain Hose
A clogged or dirty drain hose can contribute to drainage issues and unpleasant odors in your dishwasher. To check and clean the drain hose, you’ll need to disconnect it from the dishwasher and the drain pipe.
Once disconnected, inspect the hose for any visible clogs or debris, and flush it out with warm water. You can also use a long brush to remove stubborn buildup inside the hose.
After cleaning the drain hose, inspect it for any signs of damage or wear, such as cracks or holes. If the hose is damaged, it should be replaced to prevent further drainage issues and odors. Make sure to reconnect the hose securely to the dishwasher and the drain pipe to ensure proper drainage.
5. Inspect and Repair Sewer Gas Leaks
If you suspect a sewer gas leak is causing your dishwasher to smell like eggs, promptly addressing the issue is essential. Sewer gas leaks not only produce unpleasant odors but can also pose health risks. Contact a licensed plumber to inspect your plumbing system and identify potential leaks.
They can locate and repair damaged pipes, vents, or drain traps to ensure sewer gas is no longer entering your dishwasher. Regularly inspecting your plumbing system for signs of damage or wear can help prevent sewer gas leaks from occurring in the first place.
6. Address Drainage Issues
Addressing drainage issues is crucial to preventing odors and maintaining the overall performance of your dishwasher. To tackle drainage problems, check the drain pump and impeller for any blockages.
The impeller within the drain pump can become clogged with debris, preventing the dishwasher from draining properly. Please turn off the dishwasher, detach it from the power source, and remove any visible dirt before cleaning the impeller.
Another critical aspect of addressing drainage issues is ensuring the dishwasher’s air gap functions correctly. The air gap, typically near the kitchen sink, prevents wastewater from flowing back into the dishwasher. To check the air gap, remove the cover and inspect the interior for any visible blockages. If you find debris or buildup, clean it out to ensure proper airflow.
A dishwasher smelling like eggs can be unpleasant and frustrating, but it doesn’t have to be a permanent problem. By understanding the potential causes and implementing the six solutions and the steps we’ve discussed, you can effectively eliminate odors and enjoy doing the dishes odor-free.
Remember to clean the filter, use a dishwasher cleaner, run vinegar or baking soda cycles, check and clean the drain hose, inspect and repair sewer gas leaks, and address drainage issues. By taking these steps and maintaining your dishwasher regularly, you’ll not only prevent foul smell but also extend the life of your appliance and ensure it operates at peak efficiency.
Adrian is an ISCET licensed professional that has completed the National Appliance Service Technician Certification Exam and has the expertise to diagnose and repair any appliance. He is well-versed in the latest technologies and techniques and is always up-to-date on the latest industry standards.
