A towel can look freshly washed, feel clean enough and still give off that stale, damp smell as soon as it gets wet again. If you are asking, why do towels smell musty, the usual answer is not that the wash has failed completely. It is that moisture, detergent residue and bacteria have built up in the fabric over time.
This is common in busy homes, shared houses, gyms, salons, holiday lets and any setting where towels are used, washed and needed again quickly. The good news is that most musty towel smells can be prevented with a few changes to washing, drying and storage.
Why do towels smell musty, even after washing?
Towels are designed to hold water. That is useful after a shower, but it also means they hold onto body oils, skin cells, soap, fabric conditioner and detergent more readily than lighter fabrics. When a towel stays damp for too long, bacteria and mildew can multiply in those fibres. That is what creates the familiar musty odour.
A normal wash may reduce the smell without removing the cause. If the wash temperature is too low, the machine is overloaded, or too much detergent is used, residue remains behind. Once the towel is damp again, the smell returns.
The problem is often worse with thick bath sheets, heavily used hand towels and gym towels. These take longer to dry, particularly in winter or in poorly ventilated rooms. In commercial settings, a towel left in a laundry bag or pile between collections can quickly affect the rest of the load.
The most common causes of musty towels
Towels are left damp for too long
A towel scrunched on the bathroom floor, left over a radiator without being spread out, or placed in a laundry basket while still wet will not dry properly. The fibres stay warm and damp, which gives odour-causing bacteria the conditions they need.
Hang towels fully open after every use. A proper towel rail is better than a hook, as air can circulate around the fabric. If several people use one bathroom, avoid layering wet towels on top of each other.
The washing machine needs cleaning
Sometimes the towel is not the main problem. Washing machines can develop a build-up of detergent, conditioner, lint and moisture around the drawer, door seal and drum. That build-up can smell stale and transfer odours back onto laundry.
Check the rubber seal for trapped lint or residue, clean the detergent drawer, and run an empty maintenance wash at a high temperature using a suitable washing-machine cleaner. Leave the door and drawer slightly open between washes so the machine can dry out.
Too much detergent or fabric conditioner
More detergent does not usually mean cleaner towels. Excess detergent can stay in the fibres and form a coating that traps odours. Fabric conditioner can do much the same, while also reducing a towel’s absorbency over time.
Use the amount recommended for your load size and water hardness, rather than filling the drawer to the top. For towels, it is often best to use little or no fabric conditioner. A properly rinsed towel should feel soft enough after drying without a heavy fragrance covering the problem.
The wash is too cool or too full
Low-temperature washing can be suitable for many everyday garments, but heavily used towels need enough heat and movement to release oils and remove bacteria. Check the care label first, then use the warmest appropriate setting. Cotton towels can often be washed at 40°C or 60°C, depending on their colour, condition and manufacturer’s guidance.
Do not pack the drum tightly. Towels are bulky and need room for water and detergent to circulate. An overloaded machine may leave detergent behind and prevent an effective rinse.
Towels are dried slowly or put away slightly damp
A towel can smell fine when it comes out of the wash, then turn musty because it has taken too long to dry. Drying indoors is sometimes unavoidable, especially during a wet West Midlands winter, but poor airflow makes a difference.
Use a tumble dryer if the care label allows, or dry towels on an airer in a well-ventilated room. Do not fold and store them until they are completely dry, including the thicker seams and edges. A cupboard can trap the smell if even one towel is put away damp.
How to get musty smells out of towels
Start by washing the towels separately from clothing. This gives them room to move and stops heavier towels from holding smaller items in a damp bundle. Use a suitable detergent, avoid overfilling the drum and select the hottest safe wash shown on the care label.
For towels that still smell after a normal wash, a deeper clean may help. Run them through an extra rinse to remove trapped detergent. Some households use white vinegar in place of fabric conditioner for an occasional wash, while others use a laundry sanitiser designed for towels. Follow product instructions carefully and do not mix cleaning products together.
Dry the towels promptly and fully. A tumble dryer can help fluff the fibres and remove lingering dampness, but it is not essential if you have good drying conditions. What matters most is that the towel is dry all the way through before it goes back into use or storage.
If the smell persists after a thorough wash and dry, inspect the towels themselves. Older towels can become permanently loaded with residue, particularly if they have had years of conditioner use or repeated slow drying. At that point, replacement may be more practical than repeated treatment.
A simple routine that prevents the problem
For most households, the routine is straightforward: hang towels open after use, wash them regularly without excessive product, dry them quickly and clean the machine every month or two. How often towels need washing depends on how they are used. Bath towels used by one person may be washed after several uses if they are dried properly, while hand towels and face cloths usually need changing more often.
Businesses should be stricter. Towels used by guests, clients, gym members or care residents need a reliable turnover system, not an improvised pile in a back room. Separate used linen promptly, use breathable laundry bags where possible and avoid leaving wet stock overnight. Clean towels should be stored in a dry area away from cleaning chemicals, food preparation spaces and damp walls.
For hospitality, beauty and fitness businesses, the issue is not only odour. A musty towel can affect a guest review, make a treatment room feel less hygienic or create unnecessary complaints at reception. Consistent processing and fast turnaround protect the customer experience as well as the linen itself.
When a laundry service makes sense
Outsourcing can be useful when towel volumes are high, drying space is limited or staff are spending too much time managing laundry. It is particularly practical for short-let properties, salons, gyms, care settings and food-service teams that need clean stock ready on a regular schedule.
A professional laundry process gives towels the space, wash cycles and drying time they need, rather than relying on overloaded domestic machines or rushed indoor drying. For local households with bulky bedding or a large towel load, it can also take pressure off a busy week.
Warley Woods Launderette supports domestic and commercial laundry across Smethwick, Birmingham, Sandwell and the wider West Midlands, with flexible service options for regular or one-off loads.
Musty towels are usually a sign that moisture or residue is lingering somewhere in the routine. Deal with the drying, the wash process and the machine itself, and clean towels will smell like clean fabric rather than a damp bathroom.