Rewash the towel separately in the hottest water allowed by its care label, using detergent and oxygen bleach, then dry it completely in a well-ventilated place. If the musty smell in a towel that won’t wash out returns, clean the washing machine before washing the towel again.
A lasting odor usually comes from trapped bacteria, body oils, detergent buildup, mineral residue, mildew, or moisture left inside thick towel loops. The steps below cover soaking, vinegar, washer care, safe washing, complete drying, and when replacement makes more sense.
Musty Smell in a Towel That Won’t Wash Out: Start With This Deep-Clean Method
Wash the towel alone so other laundry doesn’t absorb the odor. Use the hottest water permitted on the care label, add the normal amount of laundry detergent, and include an oxygen-based laundry booster according to its package directions. Don’t add extra detergent because leftover soap can cling to the fibers and hold more odor.
After the wash, run an additional rinse if the towel feels slick or smells soapy. Move it to a dryer or outdoor clothesline immediately, and keep drying until every section feels fully dry. Never mix vinegar with chlorine bleach, oxygen bleach, or other cleaning products.
How to Soak a Smelly Towel Before Washing
Place the towel in a clean bucket or sink and fill it with warm or hot water, following the towel’s care label. Add oxygen bleach according to the product label, then fully submerge the towel for several hours or overnight if the fabric allows it. Stir or reposition the towel once during a long soak so the solution reaches all areas.
Wash the towel as soon as the soak ends. Chlorine bleach can weaken cotton fibers and damage colors, so it shouldn’t be the default treatment. If the label permits chlorine bleach, follow the product dilution and contact-time instructions exactly.
When Vinegar Helps, and When It Is the Wrong Choice
Plain white vinegar can help dissolve detergent and hard-water mineral residue. Add a measured amount to the washer’s rinse compartment, or run a separate rinse with vinegar after the main wash. Vinegar doesn’t replace detergent, and repeated vinegar soaks can leave you treating the symptom instead of removing embedded oils or mildew.
Vinegar also won’t solve an odor caused by a dirty washer. Never combine it with chlorine bleach because the mixture can release dangerous chlorine gas. Run separate cycles and rinse the machine between products.
Why a Towel Keeps Smelling Musty After It Is Washed
Towels absorb skin oils, sweat, and soap during use. Their dense loops also hold moisture longer than most clothing, especially when the towel hangs folded over a bar or sits in a hamper. If it stays damp for hours, odor-causing residue can grow or become harder to remove.
Laundry products can add to the problem. Too much detergent leaves a film, while fabric softener coats fibers and makes it harder for water and detergent to remove oils. Hard-water minerals can also bind to the fabric, making the towel feel stiff and causing a sour smell to return when it gets wet.
The Difference Between Bacteria, Mildew, and Laundry Buildup
A sour odor that returns as soon as the towel becomes wet often points to bacteria or trapped residue. A damp-basement smell, visible spots, or spreading discoloration may suggest mildew. However, smell alone can’t identify a specific organism.
Focus on thorough washing, full rinsing, and complete drying rather than trying to diagnose the odor at home. If the towel has persistent visible growth or feels slimy after cleaning, stop using it on skin.
Clean the Washing Machine Before You Wash the Towel Again
A towel can pick up odor from buildup inside the washer. Check the drum, rubber door gasket, detergent drawer, lint areas, and drain zone for residue or standing water. Wipe the gasket and dispenser with a suitable cleaner, remove visible lint, and check the drain filter if your model has one.
Next, run the machine’s cleaning cycle according to the owner’s manual. Use the washer manufacturer’s recommended cleaner and don’t add random products to the cycle. Leave the door or lid open after each load so the interior can dry, unless the manufacturer gives different instructions.
How to Wash Musty Towels Without Damaging the Fabric
Wash towels separately from clothes and don’t pack the drum tightly. An overloaded washer leaves less room for water to circulate, so detergent and odor-causing residue can remain in the loops. Use the correct detergent amount and follow the care label for water temperature.
Skip fabric softener and dryer sheets when possible. They can reduce absorbency and coat the fibers, which allows smells to remain. Use chlorine bleach only when the care label permits it, since it can weaken fabric and fade colored towels.
Choosing Oxygen Bleach, Detergent, or a Laundry Sanitizer
Regular detergent removes body oils, dirt, and everyday soil. Oxygen bleach helps lift many organic stains and odors without acting like chlorine bleach, but you still need detergent for a complete wash. Test colorfastness on an inconspicuous area and follow both the towel label and booster label.
A laundry sanitizer is a separate product with its own directions. It may require a particular amount, water temperature, or contact time, so don’t substitute it for detergent or guess the dose. No single product works for every towel, especially if the washer or drying routine continues to add moisture and residue.
Dry the Towel Completely or the Musty Odor Will Return
Shake the towel out after washing to separate the loops and improve airflow. Hang it fully open with space between layers, rather than folded over a narrow bar. If you use a dryer, select a setting allowed by the care label and keep drying until no part feels cool, damp, or heavy.
High heat can damage some fabrics, so follow the label instead of choosing the hottest dryer setting automatically. A towel that feels dry on the surface may still hold moisture in its center, especially when folded.
The Best Way to Dry Towels in a Humid Bathroom
Move the towel outdoors or to a ventilated room whenever possible. In a bathroom, use the exhaust fan, open a window when conditions permit, run a dehumidifier, or place the towel on hooks with wider spacing. These changes shorten the time the fabric stays damp.
Don’t put a wet towel into a hamper. If the hamper already smells musty, wash or wipe it according to its material and let it dry fully before using it again. Persistent odor on several towels may point to a damp wall, plumbing leak, or poor bathroom ventilation.
When a Musty Towel Should Be Thrown Away
Replace the towel if it still smells strongly after one or two proper deep-clean attempts. Replacement is also sensible when the towel has persistent visible mildew or stains, feels slimy, sheds damaged fibers, or repeatedly makes other laundry smell.
Use extra caution with towels for the face, babies, people with sensitive skin, or anyone with a weakened immune system. A low-cost towel isn’t worth endless rewashing when the fabric remains contaminated with odor or no longer rinses clean.
Prevent Musty Odors From Coming Back
Hang every towel fully open after use, and wash it before the odor becomes noticeable. Remove laundry from the washer promptly after the cycle ends, avoid overloading the drum, and reduce or stop using fabric softener. Keep the bathroom ventilated during and after showers.
Clean the washer on the schedule stated in its manual, and inspect the gasket, dispenser, and drain area regularly. If multiple towels develop the same smell, check for leaks, damp walls, standing water, or insufficient airflow instead of treating each towel separately.
Conclusion
A towel with a lasting musty smell needs a care-label-safe deep clean, a clean washer, and complete drying. Repeated odor usually points to trapped residue, ongoing dampness, or washer buildup, not a need for more detergent.
If the towel remains strongly musty after careful cleaning, replace it rather than continuing to soak and rewash it. Fresh, fully dry fabric is the safer choice for everyday use.