How to Remove Dishwasher Odor Naturally: 7 Proven Ways That Actually Work
If your dishwasher smells unpleasant even after running a full cycle, don't rush to blame your detergent. In most homes, the culprit is a silent buildup of leftover food scraps, grease, trapped moisture, and bacteria.
The good news? You don't need expensive chemicals or a repair visit. You can easily bring back that clean, fresh scent using a few simple household ingredients you likely already have in your pantry.
Quick Overview
Difficulty: Easy
Time Required: 20–40 minutes
Best For: Neutralizing unpleasant dishwasher odors & grease buildup
Main Causes: Trapped food debris, mold, hard water deposits, and dirty filters
Recommended Frequency: Monthly deep clean + weekly filter check
Why Does Your Dishwasher Smell Bad in the First Place?
It feels ironic that an appliance made for cleaning gets so dirty. Over time, your dishwasher traps grease, soap scum, and mineral deposits from hard water. These residues hide in hard-to-reach places:
The bottom filter
Interior spray arms
Rubber door gaskets
The drain line
Hidden interior corners
When moisture remains inside after a cycle, it can create conditions that encourage mold and bacterial growth. That’s why opening the door often releases a sour or musty smell. Thankfully, setting up a regular maintenance routine fixes this in no time.
7 Steps to Get Rid of Dishwasher Odors
1. Clean the Filter First (The Most Important Step)
The filter is ground zero for bad smells. If you only have time to do one thing today, make it this.
Locate and remove the bottom filter according to your dishwasher's manual.
Rinse it under warm running water.
Gently scrub away grease and trapped food particles using a soft brush or old toothbrush.
Tip: Make it a habit to check the filter every weekend if you run your dishwasher daily.
2. Run a Hot Cycle with White Vinegar
White vinegar is a mild acid that can help loosen mineral deposits and some residue inside the dishwasher.
Ensure the dishwasher is completely empty.
Place a dishwasher-safe bowl filled with 1 cup (240 ml) of plain white vinegar on the top rack.
Run a hot water cycle according to your dishwasher manufacturer's instructions.
The steam carries the vinegar throughout the machine, loosening stubborn buildup from the internal walls.
3. Sprinkle Baking Soda for a Fresh Finish
Once the vinegar cycle completes, bring out the baking soda to tackle any remaining sour odors.
Sprinkle about half a cup of baking soda directly onto the bottom of the dishwasher.
Run a short, hot-water wash cycle.
Baking soda can help absorb lingering odors and freshen the dishwasher interior.
4. Clear Out the Spray Arm Holes
Tiny food particles often get stuck inside the spray arm nozzles, blocking water flow and causing hidden odor.
Pop off the spray arms if your model allows it.
Rinse them thoroughly under the sink.
Use a toothpick or pin to clear out any clogged holes.
Keeping the spray arm holes clear helps maintain proper water flow and improves rinsing performance.
5. Wipe Down the Rubber Door Gasket
The black or gray rubber seal around the door stays wet and routinely traps food debris.
Take a damp microfiber cloth and wipe all around the inner fold of the seal.
If you notice visible mold or mildew, clean the gasket according to your dishwasher manufacturer's care instructions and dry it thoroughly.
6. Leave the Door Ajar After Every Wash
This simple habit can help reduce lingering moisture and odors.
When a cycle finishes, leave the door cracked open by an inch or two for 30–60 minutes. Allowing fresh air to circulate helps the interior dry more quickly and may reduce the conditions that encourage mold and mildew growth.
7. Deep Clean with a Commercial Cleaner (If Needed)
Natural cleaning methods can be useful for routine maintenance. However, if your machine has years of heavy grease buildup or stubborn limescale, a dedicated dishwasher cleaner may be helpful. Following the cleaner's instructions can help remove buildup that routine cleaning does not address.
Mistakes That Make the Smell Worse
Avoid these common habits to keep your dishwasher running smoothly:
Skipping the pre-rinse/scrape: Always scrape off large food chunks before loading.
Overloading: Jamming dishes together prevents proper water drainage and leaves food trapped inside.
Closing the door immediately: Trapping steam creates a damp environment perfect for bacteria growth.
Leaving dirty dishes inside for days: If you don't run the machine daily, use a quick rinse cycle to prevent food from rotting inside.
Quick Routine for Long-Term Freshness
| Action | Recommended Frequency |
| Clear the filter | Weekly |
| Leave door open to dry | After every cycle |
| Deep cleaning with vinegar or a dishwasher cleaner | Monthly or as needed |
| Clean spray arms & gaskets | Every 2–3 months |
Frequently Asked Questions
Why does my dishwasher smell like rotten eggs?
This distinctive smell usually points to food scraps decaying in the filter or water sitting at the bottom of the drain. Cleaning the filter and checking for standing water can often help reduce the odor. A deeper cleaning may be needed if the smell continues.
Is it safe to use vinegar in the dishwasher regularly?
Check your dishwasher manufacturer's instructions before using vinegar. Some manufacturers recommend against vinegar because repeated exposure to acid may affect certain rubber or internal components. If vinegar is allowed, use it as directed and place it in a dishwasher-safe bowl rather than the rinse aid dispenser.
Can I mix vinegar and baking soda together?
It’s better to use them in separate cycles. Mixing them together directly neutralizes their active properties, resulting in simple salt water. Use vinegar first to cut grease, then baking soda to deodorize.
Final Thoughts
A bad-smelling dishwasher doesn't mean you need a new appliance. In most cases, it's just a sign that your machine needs a little attention. By cleaning the filter regularly, keeping the interior dry, and following a simple deep-cleaning routine, you can help keep your dishwasher fresher and better maintained.