Is it normal for dishwashers to grow mold?

Author: Aileen Little  |  Last update: Monday, December 15, 2025

According to a Medical Mycology study, 62% of dishwashers across six continents had some fungal growth; some types were harmful, while others included household mold and mildew and yeasts. Signs that your dishwasher needs imminent cleaning include a strong, often musty odor, and visible signs of mold.

Why does my dishwasher get moldy so quickly?

Rotting food is a huge source of mold in the dishwasher, especially if it gets circulated around the wash tub during cycles. If you want to keep mold from taking hold, clean out the filter about once a week, and give the filter fixture a good scrub in soapy water at least once a month.

Is it safe to use a dishwasher with mold?

Yes it will be safe. Mold in dishwashers is not unusual. Run regular hot cleaning cycles in the future, use heat dry and let the interior dry out as often as possible and mold should be under control.

How do I get rid of mold in my dishwasher?

Bleach is the most effective cleaner for mold, and it works best if you let it set for a while &/or soak parts that can be removed and soaked. So I'd start by adding a few tablespoons of bleach to the dishwasher and start a cycle, then stop it a minute or two into the cycle and let it sit for a while before restarting.

Can I put bleach in my dishwasher to get rid of mold?

Bleach is the most effective cleaner for mold, and it works best if you let it set for a while &/or soak parts that can be removed and soaked. So I'd start by adding a few tablespoons of bleach to the dishwasher and start a cycle, then stop it a minute or two into the cycle and let it sit for a while before restarting.

My Dishwasher is Growing Mold!

How do I stop mold from growing in my dishwasher?

While bleach is a potent disinfectant, its abrasiveness isn't ideal for the dishwasher. Instead, reach for vinegar, which will kill the majority of bacteria and mold strains. Put a cup of distilled white vinegar on the top rack and run the dishwasher on the hottest program.

Can you save a moldy dishwasher?

Sanitize the Dishwasher

A great option for sanitizing a moldy dishwasher is white vinegar. Cleaning with vinegar is useful in many ways around the house, and it can effectively kill several kinds of common household mold.

Why is my dishwasher getting black inside?

Seeing slimy gray streaks, black spots, or other weird growths in your dishwasher? A lot of people think that's mold, but it may actually be a type of black yeast. It's probably not harmful for most folks, but babies, older adults, and people who are immunocompromised may be at greater risk for health complications.

How often should you clean your dishwasher?

If you wipe down every day spills and splatters on your dishwasher daily and remove leftover food particles from the bottom weekly, it makes the need for a deep clean less frequent. If frequent cleanings slip your mind, do a thorough cleaning seasonally or about every three months.

Is it OK to wash mold off dishes?

Thoroughly wash metal pans, ceramic dishes and utensils (including can openers) with hot soap and water. Rinse and then sanitize them by boiling in clean water or immersing them for 15 minutes in a diluted bleach solution (1 tablespoon of unscented, liquid chlorine bleach per 1 gallon of drinking water).

What kind of mold grows in dishwashers?

In addition, most dish-washing detergents contain salt, which yeasts, and black mold thrive on. There are plenty of different types of molds, each with their own qualities and preferences. Some will grow around leftover food particles; other types prefer rubber parts of the dishwasher or within the drain seal.

How to deep clean a dishwasher?

First, fill a dishwasher-safe bowl with one cup of white vinegar and place it on the bottom of the empty dishwasher. Set the dishwasher to run on a hot water cycle. The vinegar will break down any remaining bits of food, grease, soap scum, residue, and any other leftover grime.

What temperature kills mold?

Most yeasts and molds are heat-sensitive and destroyed by heat treatments at temperatures of 140-160°F (60-71°C).

Can mold in dishwasher make you sick?

Can Dishwasher Mold Make You Sick? Of course it can. Mold exposure doesn't just occur if you sit next to it or inhale it. Eating mold is quite possibly more dangerous.

When to replace a dishwasher?

Common Signs It's Time To Buy a New Dishwasher
  1. Dishes Continue To Come Out Dirty. ...
  2. It's Over 10 Years Old. ...
  3. Dishes Don't Come Out Hot. ...
  4. The Door Doesn't Close Properly. ...
  5. Water Doesn't Drain.

Will running the dishwasher get rid of mold?

Dishwashers can be great at eliminating visible grime, but they are not always reliable with mould. That is because mould spores can cling onto tight areas that are tough for dishwasher jets to reach. The heat from a standard wash might not be enough.

What is the average life of a dishwasher?

Average Lifespan of Dishwashers

According to reputed appliance repair technicians and manufacturers, the average home dishwasher lasts between 10 to 15 years with regular use and proper maintenance. Even an appliance from the best dishwasher brands will only last 15 to 20 years at most.

Can I run the dishwasher empty to clean it?

Yes, you can run an empty dishwasher to clean it, and doing so is actually recommended as a regular maintenance practice.

Should I really run my dishwasher every night?

Note: For fire safety reasons, only run appliances like dishwashers while you're home, and try to avoid running them when you're sleeping. If you're not a night owl, consider running the machine early in the morning before you go to work to still snag the cost savings.

Why is my dishwasher always moldy?

The filter collects food particles and any other debris from your dirty dishes. Unfortunately, rotting food can be a massive source of dishwasher mold, particularly when it is circulated again around the tub during a wash cycle.

How do I get rid of mold behind my dishwasher?

Mix 2 cups hot water with ½ cup distilled white vinegar

in a bowl or empty spray bottle, and apply to the moldy areas as well as all seals and crevices where mold might be hiding.

How do you know when your dishwasher is dying?

Experts say to check if dishes don't come out clean, glasses are cloudy, or the door doesn't latch.

What does mold in a dishwasher look like?

Black mold, perhaps the most notorious of molds, is a common inhabitant of dishwashers and it may resemble mildew, rotting food, or black spots around your dishwasher's door seal, drain, or vent.

What is the difference between mildew and mold?

Mildew has a gray, white or light brown color and generally rests flat on the surface of a moist area. It has a powdery appearance that may have a distinct, foul odor. Mold has a fuzzy, raised appearance and in unaired areas has a strong, musty smell. It often appears in darker shades of black, green and red.

Are dishwasher cleaning tablets worth it?

"While dishwasher tablets and pods tend to be more expensive, they invariably outperform powder in our dishwasher detergent tests," says Matthew. "The top 10 products in our dishwasher detergent review are all either tablets or pods. And the lowest-ranked products are all powders, sheets and gels."

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