How to Fix a Smelly Dishwasher: A Step-by-Step Guide

Updated at: 02/02/2025

That fresh, clean scent you expect from your dishwasher? Sometimes, it’s replaced by a rather unpleasant odor. A smelly dishwasher isn't just off-putting; it can also indicate underlying issues that need attention. From lingering food particles to a build-up of mold and mildew, the sources of this unwelcome aroma can be varied and sometimes surprisingly stubborn. Ignoring the problem won't make it go away, and could even lead to more significant mechanical problems down the line. A consistently smelly dishwasher can also impact the cleanliness of your dishes, leaving them with a lingering unpleasant scent.

Fortunately, fixing a smelly dishwasher is often easier than you might think. This guide will walk you through a series of simple steps to identify the source of the odor and effectively eliminate it, leaving your dishes sparkling clean and your kitchen smelling fresh. Let's dive into our step-by-step process to banish that foul dishwasher smell for good.

Safety Guidelines

  • Always disconnect the dishwasher from the power supply before attempting any cleaning or repairs.
  • Never mix cleaning chemicals. Use only products specifically designed for dishwashers and follow their instructions carefully.
  • If you are unsure about any step of the repair process, consult a qualified appliance repair technician.

Methods: Deep Cleaning Your Dishwasher

Tools Needed

  • dish soap
  • warm water
  • bottle brush
  • rag or brush
  • hot soapy water

Step-by-Step Instructions

  1. Clean the Filter

    • Remove the bottom rack and twist out the filter.
    • Wash the filter with dish soap and warm water. Use a bottle brush to scrub out any hard-to-reach spots.
    Wash the filter with dish soap and warm water. Use a bottle brush to scrub out any hard-to-reach spots.Wash the filter with dish soap and warm water. Use a bottle brush to scrub out any hard-to-reach spots.
    Clean the Filter

  2. Deep Clean the Dishwasher Interior

    • Take all the racks out of the dishwasher and scrub the inner walls and door with a rag or brush soaked in hot soapy water to remove built-up grease and grime.
    • Clean the racks in your sink. Don't forget to wipe down the door gasket.
    Clean the racks in your sink. Don't forget to wipe down the door gasket.Clean the racks in your sink. Don't forget to wipe down the door gasket.
    Deep Clean the Dishwasher Interior

Tips

  • The door gasket can also accumulate smelly dirt and food particles.

Methods: Vinegar and Baking Soda Rinse

Tools Needed

  • white vinegar
  • baking soda

Step-by-Step Instructions

  1. Vinegar Rinse

    • Set one cup (240 milliliters) of white vinegar in the top rack and run a full cycle with no other dishes in the washer.
    Set one cup (240 milliliters) of white vinegar in the top rack and run a full cycle with no other dishes in the washer.
    Vinegar Rinse

  2. Baking Soda Rinse

    • Sprinkle a layer of baking soda over the bottom of the dishwasher and run it again.
    Sprinkle a layer of baking soda over the bottom of the dishwasher and run it again.
    Baking Soda Rinse

Tips

  • These two common household products will help break down lingering odors and grease.

Read more: How to Easily Install a Tight Washing Machine Drive Belt: 3 Simple Techniques

Common Mistakes to Avoid

1. Forgetting to clean the filter

Reason: Food particles and grime accumulate in the filter, leading to bacterial growth and foul odors.
Solution: Thoroughly clean the filter by removing it, scrubbing it with a brush and soapy water, and rinsing it completely before reinstalling.

2. Neglecting to check the spray arms

Reason: Clogged spray arms prevent proper water circulation, leaving food residue and causing a smelly build-up.
Solution: Remove the spray arms, check for clogs, and clean them with a toothpick or small brush, ensuring they spin freely.

FAQs

Why does my dishwasher smell like mildew?
Mildew often develops due to trapped food particles and moisture. Ensure you're scraping food scraps off dishes before loading, and run a monthly cleaning cycle with a dishwasher cleaner or a cup of white vinegar.
My dishwasher smells like sewage. What should I do?
A sewage smell suggests a blockage or leak in your plumbing system. Check the drain hose for clogs and ensure proper ventilation. If the smell persists, call a plumber as there may be a more serious issue.
I've cleaned my dishwasher, but it still smells bad. What else can I try?
Check the dishwasher's spray arms for clogs. Make sure the filter is thoroughly cleaned and replaced if necessary. Also, consider cleaning the door seal and any rubber gaskets with a damp cloth and mild detergent, as these areas can harbor bacteria and mold.