How to Remove Mineral Buildup From Your Dishwasher

By Michael Franco

August 22, 2024

There was a time when having a dishwasher felt like a luxury. These days, though, dishwashers are a solid fixture in our kitchens, offering a quick, easy and efficient way to get our dishes clean.

This May Also Interest You: Do I Need to Pre-Rinse My Dishes Before the Dishwasher?

However, over time, users might notice a decline in the performance of their dishwashers, often attributed to mineral buildup. This accumulation of minerals can result in cloudy glassware, residue on dishes, clogs, bad odor and even operational issues within the dishwasher itself. In short, your dishwasher might need washing itself.

Knowing how to effectively clean mineral buildup is crucial for maintaining the lifespan and functionality of your dishwasher — and it can help you avoid costly repairs. And once you understand that, eliminating mineral build-up is a very straightforward task that you can carry out using items you likely already have on hand.

Why Is There Mineral Buildup in My Dishwasher?

Mineral buildup in dishwashers is primarily caused by hard water, which is water that contains high levels of minerals including calcium and magnesium. When hard water evaporates, it leaves behind mineral deposits. Over time, these deposits accumulate and can affect the performance of your dishwasher. Here are some of the main reasons why mineral buildup occurs:

Hard Water

As mentioned, the primary culprit behind mineral buildup is hard water. Regions with hard water have higher concentrations of dissolved minerals, which are left behind on surfaces as water evaporates.

Frequency of Use

The more frequently a dishwasher is used, the more water passes through it, increasing the likelihood of mineral deposits forming on internal components and dishes.

Detergent Inefficiency

Some detergents are less effective at dealing with hard water minerals, allowing buildup to occur more quickly.

Lack of Regular Cleaning

Regular maintenance and cleaning of your dishwasher are essential. Without it, mineral deposits can build up unchecked, leading to more significant issues over time.

Water Temperature

Higher water temperatures can cause minerals to precipitate out of the water more rapidly, leading to faster buildup of what's known as limescale.

Step-by-Step Guide to Cleaning Mineral Buildup

To effectively clean mineral buildup from your dishwasher, you'll need a few basic tools and materials. Here’s a detailed guide to help you through the process.

Things You'll Need

White vinegar
Baking soda
A soft brush or old toothbrush
Dish soap
A clean, dry cloth or paper towels
A small container or cup
A toothpick or needle (for cleaning spray arms)

Step 1: Prepare the Dishwasher

Empty the Dishwasher

Ensure the dishwasher is completely empty before you start the cleaning process. Remove any dishes, utensils, and racks if possible.

Inspect and Clean the Filter

Locate the dishwasher filter, typically found at the bottom of the dishwasher. Remove the dishwasher filter and rinse it under hot water to remove any debris. Use a soft brush and dish soap to scrub away any stubborn residue. Rinse thoroughly and set the dishwasher filter aside to dry.

Step 2: Clean the Spray Arms

If your dishwasher allows, remove the spray arms. Inspect the holes where water sprays out, as these can often become clogged with mineral deposits. Use a toothpick or needle to carefully clean out any debris or buildup from the spray holes. Rinse the spray arms under hot water to ensure they are clear.

Once clean, reattach the spray arms to the dishwasher.

Step 3: Clean the Inside of the Dishwasher With Baking Soda and Vinegar

Vinegar Wash

Fill a small container or cup with white vinegar. Put this container on the top rack of the dishwasher and run a hot water cycle. As the vinegar is sprayed around the inside of the machine, it will help dissolve mineral deposits and sanitize the interior.

Baking Soda Rinse

After the vinegar wash, sprinkle a cup of baking soda across the bottom of the dishwasher. Run a short, hot water cycle. Baking soda is a mild abrasive that will help remove any remaining stains and odors.

Step 4: Clean the Dishwasher Door and Seal

Use a mixture of warm water and dish soap to scrub the inside of the dishwasher door, paying close attention to the edges and corners where buildup can occur. Wipe down the rubber seal around the door with a damp cloth. For stubborn buildup, use a soft brush and a bit of vinegar.

Step 5: Final Rinse and Dry

To ensure all cleaning agents and loosened debris are rinsed away, run a normal cycle (without any dishes) with hot water. Once the cycle is complete, leave the dishwasher door open to allow it to air dry completely.

More Related Articles:

Follow us