How to Use Baking Soda to Get Rid of Bad Laundry Smells for Good

Bad laundry smells have a special talent for showing up at the worst possible time. You pull on a “clean” T-shirt, and suddenly it smells like gym locker regret. You dry a load of towels, fold them neatly, and thensurprisethey still carry that suspicious damp-basement vibe. If this keeps happening, your laundry is not trying to ruin your reputation on purpose. It is usually dealing with a mix of trapped moisture, detergent residue, body oils, mildew, and a washer that may need a little tough love.

The good news is that baking soda can absolutely help. The better news is that it is cheap, easy to use, and probably already sitting in your kitchen waiting for its big moment. The best news? When you use it the right wayand fix the habits that cause the odor in the first placeyou can stop the stink cycle for good.

This guide breaks down exactly how to use baking soda for smelly clothes, towels, workout gear, and funky washing machines, plus what not to do if you want laundry that smells clean instead of “mysteriously less awful.”

Why Laundry Smells Bad in the First Place

Before you throw baking soda at the problem like confetti, it helps to know what causes bad laundry smells. Most of the time, laundry odor is not one single villain. It is an annoying little team effort.

1. Damp fabric gives odor a head start

Clothes left sitting in the washer, hamper, or a sweaty gym bag stay wet long enough for mildew and odor-causing microbes to move in and start decorating. Towels are especially dramatic about this. They hold onto moisture like it is a full-time job, so they often develop that sour smell even after washing.

2. Too much detergent leaves residue behind

More detergent does not always mean cleaner clothes. In fact, using too much can leave a film behind on both fabrics and the inside of the machine. That residue traps body oils, dirt, and odors. Front-load machines are especially prone to this because they use less water than older top-loaders.

3. Your washer may be part of the problem

If your washer smells musty, your laundry can come out smelling musty too. Soap buildup, fabric softener residue, lint, stagnant water, and moisture around the door gasket or dispenser drawer can all create a lovely little odor ecosystem. And by “lovely,” I mean disgusting.

4. Fabric softener can make things worse

Fabric softener may make towels feel plush for a while, but over time it can coat fibers and trap smell. That is one reason towels and activewear often start smelling funky even when they look freshly washed.

5. Some odors need more than a regular wash

Sweat, mildew, pet bedding, smoke, food spills, and heavily used towels often need pretreatment or soaking. A standard cycle with regular detergent may not fully remove the odor source once it has settled into the fibers.

Why Baking Soda Works

Baking soda, also known as sodium bicarbonate, is popular in laundry for one very simple reason: it helps neutralize odors instead of merely covering them up with perfume. It is mildly alkaline, which makes it helpful for dealing with many sour, sweaty, and acidic smells. It can also help loosen light residue and freshen fabrics when used correctly.

That said, baking soda is not magic fairy dust. It can help deodorize laundry and freshen a smelly washer, but it is not a substitute for good detergent, a clean machine, or drying clothes promptly. Think of it as a smart assistant, not the CEO of clean.

How to Use Baking Soda in Laundry the Right Way

Add 1/2 cup to a smelly load

For lightly to moderately smelly laundry, add 1/2 cup of baking soda directly into the washer drum, not the dispenser. Then add your detergent in its usual place and run the cycle using the warmest water the care label allows. This works well for everyday odors in T-shirts, pajamas, socks, and general household laundry.

Best for: everyday mustiness, body odor, lightly sour towels, stale clothing from storage.

Use a baking soda soak for stronger smells

When a regular wash is not enough, soaking helps. Fill a tub, sink, or basin with water and dissolve 1/2 to 1 cup of baking soda. Let the smelly items soak for several hours or overnight, then wash as usual with detergent. This gives baking soda more time to work on odor trapped in the fibers.

Best for: musty towels, mildew smell, workout clothes, smoky clothes, and clothing that has been forgotten in the washer long enough to develop a whole backstory.

Make a paste for odor-prone spots

For armpits, collars, socks, and other heavy-odor areas, mix baking soda with water to form a thick paste. Rub it gently into the problem spot, let it sit for about 20 to 30 minutes, then wash the item. This method is especially helpful on workout shirts and undershirts where odor seems to cling like it pays rent.

Best for: sweat smell, deodorant buildup, stinky underarms, sports gear.

Use it strategically, not mindlessly

Baking soda can be useful, but it is not always something you need in every single load forever. If your laundry smells fine and your washer is clean, plain detergent used correctly may do the job. Use baking soda when odor is an issue, when you are dealing with towels or activewear, or when a load needs a deodorizing boost.

The Best Laundry Routine for Smelly Clothes

If your goal is to get rid of bad laundry smells for good, not just until next Tuesday, follow this routine:

Step 1: Sort the worst offenders

Separate towels, gym clothes, pet blankets, and heavily soiled items from your regular clothes. These loads need more attention and often need warmer water, longer cycles, or a presoak.

Step 2: Don’t overload the machine

Stuffing the washer like a Thanksgiving turkey prevents water and detergent from moving through the fabric properly. Clothes need room to tumble so odors can actually wash out.

Step 3: Measure your detergent

This step is boring, which is exactly why people skip it and then wonder why their washer smells like sadness. Use the amount recommended for your load size and machine type. More is not better. More is often residue in disguise.

Step 4: Add baking soda to the drum

For loads with odor issues, add 1/2 cup of baking soda directly to the drum. Do not dump it into your washer’s built-in dispenser unless your machine manual specifically says that is okay.

Step 5: Wash in the warmest safe temperature

Always follow the fabric care label, but within those rules, warmer water usually helps with odor, oils, and residue more than cold water alone. Towels and sturdy cotton items often benefit from a hot wash. Delicates do not.

Step 6: Dry fast and dry fully

Do not leave wet laundry sitting around while you “circle back later.” Later is where mildew lives. Move laundry to the dryer or drying rack promptly, and make sure it is fully dry before folding or storing it.

How to Use Baking Soda on Specific Smelly Laundry Problems

Musty towels

Towels love to trap detergent, softener, body oils, and moisture. Wash them separately, skip fabric softener, and use 1/2 cup of baking soda in the drum. If they still smell sour, do a presoak first. For older towels with major buildup, you may need a second hot wash or a more intensive residue-removal routine.

Workout clothes

Activewear holds onto sweat differently than cotton because the fibers are built to wick moisture, not necessarily to release odor easily. Turn the clothes inside out, pretreat the underarm and waistband areas with a baking soda paste, let it sit, then wash. Avoid overusing fabric softener on athletic gear because it can coat the fibers.

Clothes left in the washer overnight

Yes, it happens. No, you are not the first. Rewash the load with detergent and 1/2 cup of baking soda. If the smell is strong, soak first. Then dry immediately. If the load still smells off after drying, wash it again. The dryer does not erase mildew odor; it just bakes the disappointment in.

Stored clothes that smell stale

For clothes that smell dusty or musty from long storage, soak with baking soda before washing or add it directly to the wash. Once the clothes are clean and fully dry, store them in a cool, dry, well-ventilated space.

Pet bedding and household linens

Baking soda is useful here because these fabrics often collect body oils, fur, dander, and lingering smells. Shake off loose debris first, then wash with detergent and baking soda. Dry thoroughly before putting the items back into use.

How to Clean a Smelly Washer with Baking Soda

If your machine smells bad, your clothes are fighting an uphill battle. A washer that has buildup, trapped moisture, or mildew around the gasket will keep sharing that odor with every load like an unwanted group project.

Basic washer refresh

1. Make sure the washer is empty.
2. Wipe out lint, residue, and visible grime.
3. Add 1/2 to 1 cup of baking soda directly to the drum.
4. Run a hot wash or the washer’s cleaning cycle, following the machine manual.
5. When the cycle ends, wipe the drum, door seal, glass, and dispenser area.
6. Leave the door or lid open so the inside can dry fully.

This can help freshen the tub and reduce odor, but for deeper buildup or persistent mildew, your washer may need the manufacturer’s recommended cleaning cycle or washer cleaner. In some machines, baking soda is helpful for deodorizing, but not strong enough on its own to remove deep deposits or sanitize the entire interior.

Don’t forget these hidden trouble spots

• Door gasket: Wipe under the folds where water and residue hide.
• Detergent drawer: Remove and wash away buildup.
• Pump filter: Clean it if your front-loader has one.
• Door or lid: Leave it open between loads for airflow.

Mistakes That Keep Laundry Smelly

Using too much product

Too much detergent, too much softener, too many “laundry boosters,” and too many internet hacks can leave residue behind. Keep it simple and measured.

Mixing every trend into one load

Baking soda has its place, but your laundry does not need a chemistry experiment every Saturday. More additives do not automatically create cleaner results. In some cases, using baking soda alongside detergent routinely may reduce cleaning performance, depending on the detergent formula and machine.

Ignoring the washer itself

You can keep treating the clothes, but if the machine is funky, the problem keeps coming back. A monthly clean cycle is one of the least glamorous and most effective laundry habits you can build.

Leaving clothes wet after washing

This one is huge. Clean laundry that stays wet too long starts to smell like it has made bad choices. Move it, dry it, and do not negotiate with the hamper goblin.

When Baking Soda Is Not the Best Choice

Baking soda is generally safe for many laundry situations, but it is not for everything. Check clothing care labels and your washer manual first. Be cautious with delicate fabrics, wool, silk, leather, embellished items, or anything with a special finish. Also, if your washer manufacturer recommends a specific cleaner or cycle, use that guidance rather than freelancing your way into an appliance repair appointment.

If the smell persists after repeated washing and machine cleaning, the issue may be deeper than fabric odor. Check for a dirty drain hose, standing water, mold around the washer, hidden moisture in the laundry area, or items that simply need to be replaced.

How to Keep Laundry Smelling Fresh for Good

• Use the correct amount of detergent.
• Wash sweaty clothes quickly instead of letting them marinate.
• Skip or reduce fabric softener, especially on towels and activewear.
• Clean the washer monthly.
• Wipe the gasket and dispenser regularly.
• Leave the washer door or lid open after each load.
• Dry clothes promptly and completely.
• Store laundry only when fully dry.

Final Thoughts

If your laundry keeps smelling bad, baking soda is one of the simplest and most effective tools you can use to fight back. It can help neutralize stubborn odors in clothes, towels, workout gear, and even the washer itself. But the real secret to getting rid of bad laundry smells for good is not just adding baking soda and hoping for the best. It is pairing baking soda with smarter laundry habits: using less product, cleaning the washer, drying loads quickly, and treating odor-prone items before they turn into science projects.

In other words, baking soda is the hero, but good laundry habits are the sequel that makes the ending stick. Use both, and your clothes can finally smell like “freshly cleaned” instead of “technically washed.”

Extra Reader Experience Section: Common Real-Life Laundry Smell Battles

One of the most common experiences people have with baking soda and smelly laundry starts with towels. The towels look perfectly clean, come out of the dryer warm and fluffy, and then the second they get damp again, that sour smell returns like an unwelcome houseguest. In many homes, the fix is not one single miracle wash. It is a combination of washing the towels separately, skipping fabric softener, using a measured amount of detergent, and adding baking soda to break the cycle of residue and odor. People are often surprised that the real enemy was not “dirty towels” at all, but buildup. Once the towels are cleaned more thoroughly and dried completely, they stop smelling like an abandoned pool locker.

Another familiar situation is activewear. A lot of people notice that leggings, sports bras, and synthetic workout shirts still smell sweaty even after a full wash. This happens because performance fabrics hold onto body oils and odor molecules more stubbornly than plain cotton. A common improvement is to pretreat the underarm area or waistband with a baking soda paste, let it sit for a bit, and then wash the load without overstuffing the machine. Many people also discover that fabric softener makes the issue worse, because it coats the fibers instead of helping them release odor. Once they stop using too much detergent and stop treating activewear like bath towels, the smell usually becomes much easier to control.

Then there is the classic overnight-washer mistake. Almost everyone has done it. You wash a load, forget about it, remember it the next morning, open the door, and get hit with a smell that says, “This is no longer a normal load of laundry.” One of the most practical baking soda routines for this situation is to rewash the clothes with detergent and a half cup of baking soda, then dry them immediately. People who deal with this problem more than once often realize the bigger lesson: the washer itself may need cleaning too. Once the gasket, drum, and dispenser get cleaned and the door is left open after use, the “I forgot the load again” disaster becomes much less dramatic.

Stored clothing is another big one. Sweaters, guest-room linens, and off-season clothes can come out of storage smelling stale, musty, or just oddly old. A baking soda soak or a wash with baking soda often freshens the items enough to make them wearable again, but the longer-term win usually comes from changing storage habits. Clean, dry items stored in breathable containers or well-ventilated closets tend to stay fresher. People often blame the clothes when the closet itself is the thing holding onto moisture and odor.

And then there is the washer-cleaning revelation. Plenty of people try baking soda on clothes first and only later realize the machine has been the odor source all along. Once they run a cleaning cycle, wipe the door seal, clean the filter, and stop shutting the door immediately after a load, the entire laundry room smells better. That is often the moment baking soda goes from “random pantry item” to “quiet little laundry MVP.” Not because it performs magic, but because it works best when used as part of a smarter system. That is the experience many people end up having: baking soda helps a lot, but the real victory comes from finally understanding why the smell kept coming back in the first place.