If you need to know how to remove mildew smell from clothes, the fix is usually a combination of deep cleaning, proper drying, and better storage.
The key is treating both the odor and the moisture conditions that caused it, or the smell often comes back.
Why clothes develop a mildew smell
Mildew odor forms when damp fabric stays in a warm, poorly ventilated space long enough for mold and bacteria to grow.
Common causes include leaving laundry in the washer too long, storing clean clothes while they are still slightly damp, and packing items too tightly in closets, drawers, or plastic bins.
Natural fibers like cotton, linen, and wool can hold moisture longer than you expect, but synthetic fabrics can trap odor too because oils and residues cling to the fibers.
Once mildew sets in, regular detergent alone may not be enough to remove it.
Start by checking the fabric care label
Before treating the smell, check the garment care label for washing temperature, bleach safety, and drying instructions.
Delicate items, dry-clean-only fabrics, wool, silk, and embellished clothing may need gentler methods than standard cotton shirts or towels.
- Machine-washable items: can usually be treated with vinegar, baking soda, oxygen bleach, or a second wash cycle.
- Delicates: may need hand washing or a shorter soak.
- Dry-clean-only pieces: should go to a professional cleaner if the odor is strong.
Wash the clothes again, but use the right method
The most effective first step is often re-washing the item with a targeted odor treatment.
Use the warmest water safe for the fabric, because heat helps loosen residues and kill odor-causing microbes more effectively than cold water in many cases.
Add your regular detergent, but do not overload the machine.
Clothes need room to move so water and detergent can reach every fiber.
If the load is too large, the mildew smell can remain trapped in folds and seams.
Use vinegar for odor control
White distilled vinegar is a common option for removing mildew smell from clothes because it helps neutralize odor and break down residue.
Add 1 cup of vinegar to the rinse cycle, or soak the garment in a solution of 1 part vinegar to 4 parts water for 30 minutes before washing.
Vinegar works best on light to moderate odor.
It is safe for many fabrics, but avoid using it repeatedly on delicate items unless the care label allows it.
Use baking soda for stubborn smells
Baking soda can help absorb odors and refresh fabric.
Add 1/2 cup directly to the drum with your detergent, or dissolve it in warm water for a pre-soak.
This is especially useful for gym clothes, towels, and everyday cotton items with a lingering musty scent.
Baking soda and vinegar are both useful, but they work better in separate steps than when mixed together in the same container, because combining them neutralizes much of their cleaning action.
Try oxygen bleach for deep-set mildew odor
For heavily affected clothes, oxygen bleach can be more effective than detergent alone.
Look for sodium percarbonate products labeled as oxygen bleach, and follow the package instructions carefully.
This method is often suitable for white and colorfast fabrics and can help remove odor that has settled into seams, underarms, and cuffs.
Do not confuse oxygen bleach with chlorine bleach.
Chlorine bleach can damage many fabrics, weaken fibers, and sometimes leave odor problems unresolved if used incorrectly.
Soak before washing if the smell is strong
If the mildew smell persists after a normal wash, soak the garment before washing it again.
A soak gives the cleaner more time to penetrate the fibers and lift the odor source.
- Vinegar soak: 1 cup white vinegar in a basin of cool or warm water for 30 to 60 minutes.
- Baking soda soak: 1/2 cup baking soda in a basin of warm water for 30 to 60 minutes.
- Oxygen bleach soak: follow the product label for the correct concentration and soak time.
After soaking, wash the item immediately.
Letting it sit wet again can restart the odor problem.
Dry clothes completely and quickly
Even a clean garment can smell musty if it dries too slowly.
Drying is one of the most important parts of odor removal because mildew thrives in moisture.
- Shake items out before drying to open up the fabric.
- Use the dryer setting that is safe for the garment.
- If air-drying, place clothes in direct sunlight when possible.
- Do not leave damp laundry in a basket, hamper, or machine.
Sunlight can help reduce odor in some fabrics, and moving air speeds drying better than a closed room.
If you use an indoor drying rack, keep the space well ventilated and avoid crowding garments together.
How to remove mildew smell from clothes without rewashing everything
If the odor is mild, you may not need a full wash cycle.
Some quick methods can help refresh clothing between washes, especially for outer layers or lightly worn items.
- Steam: can help loosen odors in jackets and heavier fabrics.
- Fabric refresh spray: may reduce light smells, though it does not remove mildew at the source.
- Freezing: may slow odor in some items temporarily, but it is not a reliable fix for mildew.
These methods are best viewed as temporary solutions.
If the smell is clearly musty or sour, washing and thorough drying are still the most effective options.
Remove mildew smell from specific types of clothes
Different fabrics respond differently to odor treatment.
Matching the method to the fabric helps you avoid damage while improving results.
How to treat cotton and linen
Cotton and linen are usually easier to clean because they tolerate washing, soaking, and warm water better than many other fabrics.
Vinegar, baking soda, and oxygen bleach are all common options for these materials.
How to treat athletic wear
Synthetic fabrics used in activewear often trap body oils and detergent residue, which can make mildew smells harder to remove.
Use a sports detergent if available, avoid fabric softener, and dry the clothes thoroughly right away.
How to treat towels and bedding
Towels and sheets can develop a strong mildew odor if they stay damp in the laundry room or washer.
Wash them separately when possible, use enough detergent for the load size, and dry them completely before folding or storing.
How to keep mildew smell from returning
Once you learn how to remove mildew smell from clothes, prevention becomes the real time-saver.
Controlling moisture and airflow is the best defense against recurring odor.
- Take laundry out of the washer promptly.
- Dry clothes fully before putting them away.
- Clean your washer regularly, including the gasket and detergent drawer.
- Leave closet and dresser doors open sometimes for airflow.
- Store seasonal clothing in breathable containers, not sealed damp bins.
- Use dehumidifiers or moisture absorbers in humid spaces.
If the washing machine itself smells musty, run an empty hot cycle with a washer cleaner or a maintenance wash recommended by the manufacturer.
A dirty machine can transfer odor back onto clean clothes.
When the mildew smell will not go away
Some garments hold odor so deeply that repeated home treatment is not enough.
If the smell remains after several wash-and-dry cycles, the fabric may have been damaged by mold, or the item may need professional cleaning.
Clothes with visible mold, discoloration, or a persistent basement-like odor should be handled carefully.
In those cases, it is often better to replace the item than keep trying harsh treatments that could weaken the fabric further.