What to Do If Your Dishwasher Smells Bad

Use this when your dishwasher smells stale, sour, or like old food but still runs and drains normally. This is a basic cleaning guide for accessible parts, not pump, motor, control board, or plumbing repair.

By FPF Operations Team. Updated June 5, 2026. Edited for renter-aware safety.

Open apartment dishwasher with lower rack pulled out, gloves, soft cloth, and small brush for odor cleaning.

Time: 20 minutes plus a cycle. Difficulty: Easy. Safety: Low.

Editorial and Safety Note

This guide is prepared by the FPF Operations Team for general home-care education. We favor dry, visible, reversible first checks, clear documentation, and early escalation to emergency services, property maintenance, your landlord, or a licensed professional when a problem involves safety systems, electricity, gas, active water, locks, HVAC, appliances, mold, pests, height, or uncertainty.

Quick Answer

Remove old food from the bottom, clean the filter only if the manual says it is removable, wipe the door gasket, run a dishwasher-cleaning cycle or hot empty cycle with an approved cleaner, and contact maintenance if odor comes with standing water or drainage problems.

Before You Start

Let the dishwasher cool before reaching inside.
Remove dishes and racks only as the manual allows.
Use one cleaning product at a time.
Never mix bleach with ammonia or combine dishwasher cleaner with other chemicals.

Tools Needed

Gloves
Soft cloth
Paper towels
Dishwasher cleaner approved by the manual
Small brush
Phone camera

Renter Notes

Dishwashers are often landlord-owned. Check your lease or manual before removing filters, and report standing water, leaks, error codes, or repeated odors through the maintenance process.

Step-by-Step Guide

Pull out the lower rack and remove visible food scraps from the bottom.
Check the filter area and clean it only if it is designed to lift out easily.
Wipe the door gasket, edges, and detergent cup with a damp cloth.
Run a hot empty cycle or dishwasher-cleaning cycle with an approved product.
Leave the door slightly open after the cycle if your space allows it so moisture can escape.
Document and report odor that returns with standing water, leaks, or poor draining.

Common Mistakes

Ignoring food trapped under the lower rack.
Using regular dish soap and creating suds overflow.
Removing parts that are not meant to be removed.
Treating standing water as just a smell problem.

Practical Renter Details

Dishwasher odor notes

Photograph the filter area, standing water, and any food debris before cleaning what is easily removable.
Check whether the smell appears before a cycle, after a cycle, or when nearby sink/disposal drains.
Use only manufacturer-safe cleaning steps and avoid mixing vinegar, bleach, and commercial cleaners.
A dishwasher odor paired with standing water or sink backup may be a plumbing or appliance service issue.

What to Document

Filter condition
Standing water
Odor timing
Sink or disposal behavior

Short Maintenance Message

Hi, the dishwasher smells bad and I noticed [standing water/food debris/no visible debris]. The odor happens [before/after cycles/with sink use]. I cleaned only removable visible debris and did not mix cleaners. Photos attached.

What Not to Touch

Mixing cleaning chemicals
Removing appliance panels
Running repeated hot cycles if water is not draining

Stop Point

Stop if water remains in the bottom, the sink backs up, there is a burning smell, or the appliance leaks.

What Not to Do

Do not use hand dish soap in a dishwasher.
Do not open appliance panels or remove pumps, hoses, motors, or wiring.
Do not mix bleach and ammonia or layer cleaners.
Do not keep running the dishwasher if it leaks or smells like burning.

When to Pause and Ask for Help

Contact maintenance if there is standing water, leaking, burning smell, error codes, poor draining, a damaged gasket, or odor that returns soon after accessible cleaning.

FAQ

Can I clean the filter?

Only if your manual shows a removable filter. Some filters are not meant for renter cleaning.

Is vinegar okay in a dishwasher?

Only if the appliance manual allows it. Use one product at a time and never mix it with bleach.

Why does it smell after clean dishes?

Food residue, a dirty gasket, moisture, or poor draining can leave odor even after a cycle.

What if water sits in the bottom?

Stop treating it as simple odor and contact maintenance because it may be a drain issue.

Final Checklist

Visible food removed
Filter checked only if removable
Gasket wiped
Approved cleaning cycle run
No dish soap used
Standing water reported

Discussion

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