Modern dishwasher with its door open, revealing neatly stacked dishes and glasses, set against a tiled kitchen backdrop.

How to Clean a Dishwasher

In the hustle and bustle of modern life, the dishwasher stands as an unsung hero of our daily routines, tirelessly ridding our dishes of grime and grit. But, while it’s easy to take this kitchen workhorse for granted, the importance of regular dishwasher maintenance can’t be overstated. A dirty dishwasher not only performs poorly, but it can also harbor harmful bacteria, compromising the cleanliness of your dishes and, ultimately, your family’s health.

This article sheds light on the often overlooked task of cleaning a dishwasher, providing a detailed guide on the process. From the signs that your appliance needs attention to a step-by-step cleaning routine, we’ll cover everything you need to ensure your dishwasher continues to operate at its best. Just as this crucial appliance takes care of your kitchenware, it’s time for you to return the favor.


Materials Needed to Clean a Dishwasher

Cleaning your dishwasher isn’t a labor-intensive job and doesn’t require any specialized tools. Here is a list of recommended cleaning supplies and materials:

  • White Vinegar
  • Baking Soda
  • A Soft Cloth or Sponge
  • Old Toothbrush
  • Screwdriver


With your materials ready, you’re all set to begin the dishwasher cleaning process, which we will explore in the next section.


Step-by-Step Guide on How to Clean a Dishwasher

Cleaning your dishwasher might seem like a complex task, but once you break it down into manageable steps, it becomes straightforward. Here’s a detailed guide to help you through the process:


Pre-cleaning steps: Unplugging and Pre-rinsing

Before you dive in, safety first. Unplug the dishwasher or turn off the breaker that powers it. Then, remove any dishes or racks and take a moment to inspect the interior. If you spot any large pieces of food or debris, remove them by hand to allow for more effective cleaning.


Step 1: Cleaning the Dishwasher Filter

Your dishwasher’s filter is the first line of defense against food particles clogging up the works.

  1. The filter is usually located at the bottom of your dishwasher. In most models, it involves twisting it counter-clockwise and lifting it out. Consult your appliance’s manual if you’re not sure.

  2. Rinse the filter under warm running water. Use a soft brush, like an old toothbrush, to scrub off any stubborn grime or food particles. Avoid using harsh chemicals or abrasive cleaners as they can damage the filter.

  3. Once cleaned, replace the filter by slotting it back into place and turning it clockwise until it’s secured.


Step 2: Cleaning the Dishwasher Interior

Next, you need to clean the walls, racks, and the interior of the dishwasher door:

  1. Fill a dishwasher-safe bowl with one cup of white vinegar and place it on the top rack of the empty dishwasher. Run a hot-water cycle, which will help wash away grease and grime and remove any musty odors.

  2. After the vinegar cycle finishes, sprinkle one cup of baking soda around the bottom of the dishwasher. Run a short, hot water cycle again. The baking soda will further deodorize your dishwasher and brighten its interior.


Step 3: Cleaning the Dishwasher Spray Arms

The spray arms in your dishwasher can get clogged with mineral deposits and food debris, reducing their effectiveness:

  1. You can typically find the spray arms beneath the bottom rack and above the top rack. To remove them, you usually need to unscrew them. Once again, consult your dishwasher’s manual if you’re unsure.

  2. Rinse the arms under water and use a piece of wire or a toothpick to remove any debris from the holes where the water comes out.

  3. After cleaning, replace the spray arms by screwing them back into their original position.


Step 4: Cleaning the Exterior and Door Edges of the Dishwasher

Finally, we can’t neglect the outside of your appliance:

  1. For the exterior, depending on the finish of your dishwasher (stainless steel, plastic, etc.), you can use a gentle cleaner or a mixture of warm water and mild dish soap. Gently wipe down the exterior with a soft cloth or sponge, paying extra attention to buttons and handles where grime tends to accumulate.

  2. Don’t forget the door seals and hinges. Use a cloth dipped in warm, soapy water to wipe these areas clean.


That’s it! You’ve successfully cleaned your dishwasher. Regular maintenance can help improve your appliance’s efficiency and extend its life, making this process a worthwhile part of your cleaning routine.


Understanding When and Why You Should Clean Your Dishwasher

Even the best kitchen helpers need a little help themselves now and then. So, how often should you clean your dishwasher? The consensus among appliance manufacturers and home care experts is about once a month. This frequency ensures any accumulated food debris, grease, and soap scum are dealt with before they start causing problems.

But what are the telltale signs that your dishwasher needs cleaning, you might ask? Several red flags might indicate your dishwasher requires attention. If your dishes are not as clean as they used to be, or if there’s an unpleasant odor wafting from your machine, it’s a clear sign your dishwasher could do with a clean-up. Other indicators include visible debris in the bottom of the dishwasher, standing water, or if the dishwasher has started to make strange noises.

Now, why is a dirty dishwasher a problem? Not only does it affect the performance of the appliance, but it also poses potential health risks. Over time, food particles and grease build up in the filter and corners of the machine, reducing its efficiency. As a result, your dishwasher has to work harder, leading to potential breakdowns and a shorter overall lifespan.

From a health perspective, the warm, damp environment of a dishwasher is a breeding ground for bacteria and mold. A buildup of these microorganisms can contaminate your dishes, posing a risk to your family’s health. Furthermore, a dirty dishwasher can contribute to an unpleasant odor in your kitchen, detracting from the overall cleanliness and comfort of your home.

In short, cleaning your dishwasher is a simple task that can pay off significantly in terms of appliance performance and home hygiene. In the following sections, we’ll guide you through the process to ensure your dishwasher remains a reliable and efficient tool in your kitchen.


Additional Tips for Dishwasher Maintenance

Now that you’ve mastered the art of cleaning your dishwasher, it’s essential to maintain this kitchen appliance properly to ensure it remains in top condition for years to come.


Suggestions on Regular Use Habits that Can Help Keep Your Dishwasher Clean

  1. Rinse Before Loading: While it’s not necessary to pre-wash dishes, rinsing off larger food particles can prevent them from getting trapped in your dishwasher.

  2. Load Correctly: Load your dishes so that water can reach all surfaces. If items are overcrowded or blocked by others, they may not get clean, leaving residual grime in the dishwasher.

  3. Use the Right Detergent: Ensure you’re using a dishwasher-specific detergent. Other soap types can create too many suds, leading to buildup.

  4. Run Full Loads: Not only is it more energy-efficient, but full loads can also prevent excess food or detergent from sticking to the dishwasher.


Recommendations for Professional Servicing

While regular cleaning can keep your dishwasher in good shape, professional servicing once a year can help maintain its performance and longevity. A professional technician can inspect and service parts you can’t easily access, like the heating element and internal plumbing, ensuring your dishwasher is in peak condition.


Indicators That Your Dishwasher May Require a Professional Repair

Certain issues may indicate that it’s time to call in the professionals:

  1. Poor Cleaning Performance: If your dishwasher is regularly failing to clean your dishes properly, even after cleaning and maintenance, there could be an issue with its internal components.

  2. Leaking: Any sign of leakage should be addressed by a professional, as this could indicate a problem with the dishwasher’s seals or plumbing.

  3. Strange Noises: While dishwashers aren’t silent, unusual sounds could mean there’s a loose or broken part.

  4. Failure to Start: If your dishwasher won’t start, there could be an electrical issue that requires professional attention.



Regularly cleaning your dishwasher and paying attention to these tips can help you get the most out of this vital kitchen appliance. If you do run into issues, don’t hesitate to seek professional help to keep your dishwasher running smoothly.

We hope this guide helped demystify the process of cleaning your dishwasher and inspires you to give your kitchen helper the tender loving care it deserves. Remember, a clean dishwasher means a healthy, happy kitchen.

Want more tips on how to keep your kitchen sparkling clean? Check out our other articles on CleanOMNIA.


Frequently Asked Questions

Ideally, you should clean your dishwasher at least once a month to prevent buildup of grime and debris.

You will need white vinegar, baking soda, dish soap, a soft-bristled brush, and a microfiber cloth.

Start by removing any loose debris or food particles from the bottom of the dishwasher. Then, place a cup of white vinegar in a dishwasher-safe container on the top rack and run a hot water cycle. Once the cycle is finished, sprinkle a cup of baking soda on the bottom of the dishwasher and run another hot water cycle.

Remove the racks from the dishwasher and use a soft-bristled brush to scrub away any buildup or debris. If there are stubborn stains, you can soak the racks in a mixture of hot water and dish soap before scrubbing.

Remove the spray arm and soak it in a mixture of white vinegar and water for about 15 minutes. Then, use a soft-bristled brush to scrub away any buildup or debris.

Locate the dishwasher filter and remove any debris or buildup. If the filter is particularly dirty, you can soak it in a mixture of hot water and dish soap before scrubbing.

Use a microfiber cloth and dish soap to gently clean the exterior of the dishwasher. Avoid using abrasive cleaners or scrubbers that could scratch the surface.

Make sure to scrape off any excess food particles before loading dishes into the dishwasher, and run hot water in the sink for a few seconds before starting the dishwasher cycle to ensure that the water is hot enough to clean effectively.