Why Does My Laundry Smell Musty? Causes and Fixes Using Detergent and Scent Boosters

Quick Answer

Musty laundry usually comes from dampness left too long, detergent buildup, or a dirty washing machine. Fix it by rewashing with a quality detergent, adding a scent booster, and ensuring clothes dry completely.

You pull a shirt out of the washer and instead of fresh, you get a damp, sour smell. Musty laundry is a common frustration, but it's fixable once you understand what causes it.

In most cases, the problem isn't the clothes themselves—it's how they're washed, dried, or stored. By addressing the root cause and using the right products, you can keep your laundry smelling clean and fresh.

Common Causes of Musty Laundry

Musty smells usually come from moisture and bacteria. If clothes sit in the washer too long after the cycle ends, bacteria multiply and create that sour odor. Similarly, drying clothes on low heat or leaving them damp in a hamper invites mildew.

Detergent buildup is another culprit. Too much detergent or using the wrong type can leave a film on fabrics that traps odors. Over time, this residue also builds up inside your washing machine, making every load smell musty.

• Always transfer clothes to the dryer promptly after washing.
• Use the recommended amount of detergent—more isn't always better.

How to Fix Musty Clothes

Start by rewashing the affected items with a good detergent, like the CRUMB COUTURE - CROISSANT LAUNDRY DETERGENT AND SCENT BOOSTER STARTER PACK. Its Everything Wash Detergent is designed to tackle stains, dirt, and odors while leaving a fine fragrance behind.

Add a scent booster like the Signature Spin Scent Booster to infuse fabrics with a clean, crisp scent that evokes the calm after a storm. This extra step helps neutralize lingering musty odors and keeps your laundry smelling fresh longer.

• Wash in the hottest water safe for the fabric to kill odor-causing bacteria.
• Dry thoroughly—on high heat if the fabric allows.

Preventing Musty Smells in the Future

Prevention is about good habits. Don't leave wet clothes in the washer overnight, and clean your washing machine monthly with a washing machine cleaner or a hot, empty cycle with vinegar.

Also, be mindful of how you store laundry. Make sure clothes are completely dry before putting them in a closet or drawer. If you live in a humid area, consider using a dehumidifier or moisture absorber in your laundry area.

• Leave the washer door open between loads to let it dry out.
• Use scent boosters regularly to keep fabrics fresh.

Diagnosing Your Musty Laundry

• Symptom: Clothes smell musty right after washing or when they come out of the dryer. This indicates the odor is coming from the wash process itself, not just storage.
• Likely Cause: Clothes left damp too long, detergent buildup, or a dirty washing machine. Check if you leave wet clothes in the washer or if you've been using too much detergent.
• Corrective Action: Rewash with a quality detergent like CRUMB COUTURE Croissant Laundry Detergent, add a scent booster, and dry thoroughly. If the smell persists after this, consider cleaning your washing machine or trying a different detergent.
• When to Stop: If the musty smell remains after rewashing and drying, the issue may be in your machine or water supply. At this point, you may need to clean the washer or consult a professional.

Products That Help

• CRUMB COUTURE - CROISSANT LAUNDRY DETERGENT AND SCENT BOOSTER STARTER PACK: The Everything Wash Detergent delivers fine fragrance paired with a highly-effective cleaning power that targets stains, dirt, and odors. This detergent not only cleans but also fights the odors that cause mustiness, leaving a fresh bakery-inspired scent.
• Signature Spin Scent Booster: Signature Spin Scent Booster delivers a clean, crisp scent that evokes the calm after a storm, bringing a refreshing touch to your laundry routine. Adding this booster to your wash helps mask and replace musty odors with a long-lasting fresh fragrance.

Musty laundry is frustrating but not permanent. By identifying the cause and using effective products like the CRUMB COUTURE starter pack and Signature Spin Scent Booster, you can restore freshness and enjoy clean-smelling clothes every time.