How to Fix a Washer That Smells Like Mildew

How to Get the Mildew Smell Out of a Washing Machine

If your washer smells like mildew, the cause is almost always mold and bacteria growing inside the machine — in the door gasket folds, the detergent drawer, or the drum itself. This is typically caused by leaving the door closed between cycles, using too much detergent, washing primarily on cold cycles, or some combination of all three.

The good news: this is one of the most common washer complaints we hear across Bridgewater, Hillsborough Township, and surrounding Somerset County — and it’s almost always fixable without replacing the machine.

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Why Do Front Loaders Smell Worse Than Top Loaders?

Front-load washers use a rubber door gasket with deep folds that trap water and detergent residue after every cycle. If that moisture never fully dries out between washes, mold finds exactly the environment it needs — dark, damp, and undisturbed. Top loaders have far less rubber surface area and typically dry out faster, which is why this complaint is overwhelmingly tied to front-load machines.

This isn’t a defect. It’s a tradeoff of the more water-efficient design, and it’s completely manageable with the right habits.

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Where Is the Mildew Smell Actually Coming From?

The Door Gasket

Pull back the folds of the rubber door gasket and look closely. You’ll often find black or pink residue — mold or mildew buildup. This is the single most common source of washer odor we find on service calls.

Wipe down the gasket folds thoroughly with white vinegar or a dedicated washer cleaner after every few loads. For heavy buildup, deep clean it and leave the door open overnight to dry fully. Most households see the smell improve within two to three cycles.

The Detergent Drawer

The detergent dispenser is one of the most overlooked sources of mildew odor. Residue builds up inside the drawer and its housing, and mold grows there just as readily as in the gasket. Remove the drawer completely and clean it monthly — most drawers pull straight out. The housing behind it should be wiped out too.

Too Much Detergent

Excess detergent doesn’t fully rinse out and leaves residue inside the drum and seals. That residue becomes food for mold over time. Most people use significantly more than modern HE washers actually need.

Cut your detergent amount roughly in half and see if the smell improves. Use HE-specific detergent if you have a high-efficiency machine — regular detergent creates far more suds than HE machines are designed to rinse away.

Always Closing the Door After a Wash

A closed washer door traps humidity inside the drum, creating the exact environment mold needs. This is one of the most common habits we hear about on odor calls — and one of the easiest to fix.

Leave the door cracked open between loads. This single change resolves the problem for many households without any cleaning products at all.

Only Using Cold Water Cycles

Cold washes are great for fabrics and energy bills, but they don’t reach the temperatures needed to kill bacteria and mold spores that build up over time. If every load is cold, residue has less opportunity to be flushed out by heat.

Run an occasional hot water cycle — even just the monthly maintenance cycle below — to control what cold washes alone can’t.

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How to Get Rid of the Mildew Smell for Good

A consistent routine eliminates the smell within two to three cycles for the vast majority of households:

• Run an empty hot water cycle once a month with a washer cleaning tablet or two cups of white vinegar.
• Wipe the door gasket folds dry after each load.
• Leave the door cracked open between uses.
• Use the correct amount of HE detergent — less is usually more.
• Clean the detergent drawer monthly.

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Samsung Front Load Washing Machine Repair in Hillsborough Township, NJ

A homeowner in Hillsborough Township called us about a Samsung front loader that had been smelling progressively worse for several months. They’d tried multiple scented detergents to mask it without success and assumed something inside the machine had failed.

Our technician found heavy mold buildup deep in the door gasket folds — the kind that doesn’t come out with a surface wipe. The detergent drawer hadn’t been removed and cleaned since installation. The door was also being closed immediately after every load, which meant the gasket and drum never had a chance to dry out between washes.

Nothing was broken. We deep cleaned the gasket and dispenser, ran a hot cleaning cycle, and walked the homeowner through the routine that keeps it from coming back. The smell was completely gone within the next two loads.

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When Should You Call a Professional?

You can handle yourself: cleaning the gasket and detergent drawer, adjusting detergent amount, leaving the door open between loads, running a monthly hot maintenance cycle.

Call us if the smell persists after a thorough cleaning routine over several cycles, the gasket is torn or visibly degraded rather than just dirty, or the odor seems to be coming from somewhere inside the drum you can’t reach.

We service all washer brands — Whirlpool, Maytag, LG, Samsung, GE, Bosch, Kenmore, and more — across Hillsborough Township, Bridgewater, Somerville, Raritan, and Branchburg. Most odor-related calls are resolved with a thorough cleaning in a single visit.

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Frequently Asked Questions — Washer Smelling Like Mildew

How do you get the mildew smell out of a washing machine?

Run an empty hot cycle with a washer cleaning tablet or two cups of white vinegar. Clean the door gasket folds and detergent drawer thoroughly. Leave the door open between loads. Repeat monthly. Most households see the smell clear within two to three cycles.

Why does my washer still smell after cleaning it?

The most likely cause is mold embedded deep in the gasket folds that a surface wipe doesn’t reach, or the door being closed immediately after each cycle which traps moisture and undoes the cleaning. A thorough deep clean of the gasket — getting into every fold — followed by leaving the door open consistently usually resolves it.

Is a mildew-smelling washer a health concern?

Mold and bacteria buildup isn’t typically dangerous for most people, but it can irritate those with allergies, asthma, or sensitive skin since the residue transfers onto clothing during washing. It’s worth addressing for both the smell and general household hygiene.

Can too much detergent cause a washer to smell like mildew?

Yes. Detergent residue that doesn’t rinse out becomes food for mold inside the drum and seals. Cutting the amount roughly in half and switching to HE-specific detergent resolves this for many households.

Why does only my front-load washer get this smell?

The rubber door gasket on front loaders has deep folds that trap moisture after every cycle. Combined with the water-efficient design that uses less water overall, there’s less opportunity for residue to rinse away — making mold growth more likely without consistent maintenance habits.

How often should I clean my washer to prevent mildew?

Run a hot maintenance cycle with a washer cleaner once a month. Wipe the gasket after each load when possible. Clean the detergent drawer monthly. Consistent light maintenance prevents the buildup far more effectively than occasional deep cleaning after the problem has already developed.