How to Get Mildew Smell Out of Clothes (Fast)

Mildew smell in clothes is frustrating and common. It usually happens when clothes stay damp too long, whether in a washer, dryer, or storage. Even after washing, the smell can linger, making laundry feel unpleasant

The good news is that mildew odor can be removed safely and effectively. By understanding the causes, using proper cleaning methods, and following preventative habits, you can keep your clothes fresh and free of mildew smells. This guide walks you through step-by-step methods. In fabric testing method, mildew odor most often traces back to prolonged moisture exposure rather than permanent fiber damage.
This guide focuses on removing mildew odor from fabric. If you see visible mold spots or staining, follow our mold on clothes removal guide instead.

Fully drying clothes is essential. Otherwise, odors can return quickly.

Why Clothes Smell Like Mildew

Mildew odor forms when moisture stays in fabric, allowing bacteria and mold to grow. Also, poor airflow, delayed drying, or damp storage can worsen the problem. If odor appears immediately after washing, review why clothes smell after washing to rule out washer contamination or rinse issues.
Mildew odor typically smells musty, earthy, or damp and often intensifies when fabric becomes warm or humid.

Common causes include:

• Laundry left in the washer too long
• Slow indoor drying
• Humid rooms or closets
• Damp storage spaces
• Dirty washing machines
• Wet towels or gym clothes piled up

Mildew odor refers to the smell caused by moisture and microbial growth without necessarily visible mold staining. Visible mold spots require deeper remediation methods beyond odor treatment.

How to Get Mildew Smell Out of Clothes (Step-by-Step Guide)

Follow these steps carefully for best results.

Step 1 – Air Clothes Outdoors First

Hang clothes outside in sunlight or fresh air. Sunlight helps reduce odor-causing bacteria and speed up drying.

. Even a few hours can reduce the smell significantly.

Step 2 – Choose a Pre-Treatment (Based on Severity)

• Light odor → vinegar soak (30–60 min)
• Deep odor / towels / bedding → oxygen bleach soak (label-safe)
• Colors/synthetics → laundry sanitizer (label-safe)

Step 3 – Boost the Wash (Optional)

• Baking soda can help deodorize light odor
• Skip it if using sanitizer/oxygen bleach (avoid too many additives)

Step 4 – Use Proper Detergent and Cycle

Use enough detergent, but avoid overuse, which can trap odors. Use warm or hot water if fabric allows. Also, do not overload the washer, as it reduces cleaning efficiency.
Avoid overdosing detergent—extra residue can trap mildew odor and make it return.

Step 5 – Dry Clothes Completely

Dry clothes fully before storing them. Best options:

• Sun drying outdoors
• Dryer with correct heat setting
• Indoor drying with strong airflow

Never fold or store damp clothes. As a result, mildew odors will be prevented.

Why Mildew Smell Comes Back After Washing

Sometimes clothes smell fresh when wet but return to a musty odor after drying. This moisture-reactivation issue is also discussed in wet clothes smell, where damp storage allows bacteria to regrow. This happens because:

• Odor remains deep in fibers
• Washer transfers smell back to clothes
• Clothes dried too slowly
• Too much detergent leaves residue

If this happens, repeat vinegar soaking or use hotter washing (if fabric allows).

Check If Your Washing Machine Is Causing the Smell

A dirty washer often spreads mildew odor to clean laundry. If your washer carries persistent odor, follow our guide on how to remove front load washer smells to eliminate buildup inside the drum and seal.

Signs Washer Is the Problem

• Washer smells musty
• Clothes smell immediately after washing
• Black buildup in door seal
• Detergent drawer smells bad

Fabric-Specific Mildew Odor Removal

Different fabrics require different care.

Gym & Synthetic Clothes

Use a vinegar soak and wash quickly after workouts. Avoid fabric softeners—they trap odor.

Towels and Bedding

Wash in hot water if safe. Add baking soda or oxygen bleach for deeper cleaning.

Delicate & Cold-Wash Fabrics

Use mild detergent and air drying. Avoid strong chemicals. Repeat soaking if needed.

What to Do If Mildew Smell Persists

If smell remains:

• Repeat vinegar soak and wash
• Use oxygen bleach for tough odors
• Clean the washing machine
• Dry clothes longer
• Improve airflow during drying

Best Additives to Remove Mildew Odor

These help when basic washing fails:

• Oxygen bleach for deep cleaning
• Laundry sanitizers
• Enzyme odor removers
• Baking soda boosters

Always check fabric labels before use.

How to Prevent Mildew Smell from Returning

Common Laundry Mistakes That Cause Mildew Smell

• Overloading washer
• Using too much detergent
• Closing washer door immediately after washing
• Leaving clothes overnight

Fixing these habits reduces odor recurrence.

How to Check If Odor Is Really Gone

• Let clothes dry completely before testing.
• Smell the fabric in open air first.
• Then warm a small area gently with your hands — odor often reappears when fabric heats up.
• Check the thickest areas last, such as waistbands, seams, cuffs, or towel folds. Mildew odor usually hides in dense or layered sections first.
• If any musty scent returns when warmed or slightly dampened, repeat treatment before storing.

FAQs About Mildew Smell in Clothes

Final Thoughts

Mildew smell usually comes from moisture problems, not poor washing. Following proper washing, drying, and storage routines prevents most odors. By taking quick action, using safe cleaning methods, and maintaining healthy laundry habits, you can keep your clothes fresh, hygienic, and free of mildew smells. For broader odor removal strategies across different fabrics, see our odor removal steps guide