Eliminate Smelly Mold from Your Dishwasher

Opening the dishwasher door and getting hit with a strong mildew smell is an unpleasant experience. Not only is it unappetizing, but breathing in mold spores can cause allergy symptoms or even respiratory issues. Mold loves the warm, moist environment inside dishwashers, which makes them prone to fungal growth. With some diligent cleaning and preventative care though, you can eliminate smelly mold for good.

By identifying mold sources, deep cleaning all components, disinfecting with heat, and maintaining dry conditions, you can keep your dishwasher fresh smelling and mold-free.

Identify the Source of the Mold

Before scrubbing away at the visible mold inside your dishwasher, it's important to figure out exactly how and where it's getting in. Tracing it back to the source is key for preventing the mold from recurring after cleaning.

Check for plumbing leaks

Leaky plumbing either under the unit or at the water line can allow moisture into the base of the dishwasher, encouraging mold growth. Inspect for any wet areas or staining under the kickplate. Confirm water is not dripping from the copper line or valves below the device. Address any leaks before continuing.

Inspect seals around the door for gaps or cracks

Compromised door seals provide an entry point for water to get inside the tub or leaks that wet the exterior cabinet. Carefully run your fingers along the rubber gaskets checking for any gaps, cracks, or unusual hardening. If the seals seem faulty, replacement is the best option to protect from mold.

Ensure detergent compartment isn't retaining moisture

While less common than external leaks, clogged detergent or rinse agent dispensers can harbor moisture allowing mold development. Remove each insert and clean according to manufacturer's guidelines if you spot any residue buildup.

Prepare the Dishwasher for Cleaning

Now that any moisture sources have been identified and addressed, clearing out the interior and removing all removable parts will allow you to most effectively wash away existing mold and mildew.

Remove all dishware and utensils

Take out all cups, plates, pans, cutlery and anything else typically loaded in the dishwasher before cleaning. Set items aside to be hand washed after you've completed mold removal inside the unit.

Take out racks and removable parts

The racks and silverware basket should be removed and set outside of the dishwasher during cleaning. Also take out any detachable parts like filters, spray arms, or chopper blades if your model has them. This leaves full access to all interior surfaces.

Gather cleaning supplies

For mold removal, an equal parts vinegar and water solution generally works very effectively. Alternatively, specialized commercial mold cleaners are available. You'll also need clean rags, small brushes, and protective gloves.

Clean the Interior Surfaces

With full access to the inner surfaces, comprehensive cleaning can begin. Taking time to thoroughly wash all areas helps eliminate mold and prevent quick regrowth.

Mix anti-mold cleaning solution

Prepare your cleaner of choice whether that's a DIY vinegar solution or a ready-made product formulated for mold removal. Follow label instructions carefully if using a commercial cleaner.

Scrub all corners and crevices

Using a small brush, apply cleaner and scrub it into any visible mold spots or staining within the tub interior and door. Get into crevices around the rim and the narrowed section underneath bottom rack tracks. Let it soak for a few minutes before rinsing.

Target door seals and hidden areas

Use an old toothbrush, rag, or specialty brush tool designed for dishwasher cleaning to scrub the door seals where moisture readily accumulates. Check for hidden pockets of mold growth around tub structural elements or behind mountings.

Let solution soak before wiping

Make sure to let your cleaner sit for 5-10 minutes before wiping down all the interior surfaces. This dwell time helps kill mold spores and loosen buildup. Rinsing afterwards washes any residue away.

Deep Clean Components

Getting into dishwasher parts requires some disassembly but is important for mold prevention. Food and gunk accumulate that allow spores to thrive.

Remove and clean filters

Extract any filters from your unit and thoroughly rinse and scrub away debris trapped in the mesh screen or frame crevices. Soak in your anti-mold solution if needed to clear out grime before rinsing and drying.

Access and scrub the pump

Consult your owner's manual for instructions on removing the access panels to reach the circulation pump. Clean away any visible mold or food buildup clogging intake areas. Flush with water before reassembling.

Clean out spray arms and tub bottom

Detach and rinse out clogged spray arms. Use a wet/dry shop vacuum to suck up water and debris from the base tub area after removing any filters or covers blocking access.

Disinfect with a Hot Cycle

Running a high-heat dry cycle after cleaning helps kill any lingering mold spores missed during washing. Applying heat prevents quick regrowth.

Run empty dishwasher on hottest setting

With all parts cleaned and replaced, run your dishwasher on the sanitize, heavy duty, or hottest available cycle setting while empty. This exposes all areas to heat between 150-165degF to disinfect.

Allow heat to kill lingering spores

High sustained heat destroys mold growth that may be hidden in microscopic crevices. It provides a clean slate before loading your next batch of dirty dishes.

Use a rinse agent to prevent spots

Ensure your rinse agent dispenser is topped up so heated drying doesn't leave mineral spotting without a surfactant. A rinse agent prevents water beading that leads to standing puddles where mold recurs.

Discourage Future Mold Growth

Adjusting a few usage and maintenance habits can prevent repetitively dealing with smelly dishwasher mold.

Address any lingering moisture issues

If leaks, faulty seals, or clogs still compromise drying, mold will undoubtedly return. Perform repairs or request service to resolve excess moisture problems.

Leave door ajar after cycles

Get in the routine of propping open the dishwasher door slightly after the wash cycle finishes so steam can escape and the interior dries out completely. Some models have vents or auto-release features to prevent mold.

Wipe interior after each use

Use a dry towel to remove pooled water along tub edges or underside of the door. Clean up any spilled food debris that could lead to mold growth between runs. Take a minute to check that parts are draining properly.

Regularly replace seals and filters

Every few years, seals and dishwasher filters should be replaced to keep your appliance running at peak performance. Old cracked gaskets and clogged filters accumulate grime and provide pathways for mold.

By methodically cleaning, disinfecting, and maintaining your dishwasher, you can eliminate unpleasant mold odors. Addressing root causes of moisture accumulation and properly allowing for drying stops the fungal growth cycle. With vigilance, your dishwasher can continue smelling fresh and clean after each wash.