🧺 Laundry problemsHow to remove sour, musty-smelling towels

Bacteria grow while they dry slowly · warm water and fast drying

When towels smell sour even after washing, or the smell comes back once they get wet after use, it's usually bacteria that have settled into the fibers. It tends to happen when towels dry slowly, when you use a lot of fabric softener, or when the washer is overloaded. Most of the time it goes away once you change how you wash and dry them.

🔬 Why this order works

The smell comes from bacteria breaking down dead skin and oil left in the towel. Fabric softener and leftover detergent coat the fibers so they absorb less water and hold on to grime. The key is to reduce bacteria and grime with warm water and oxygen bleach, and to dry quickly.

🧺 Step by step

Tap a step when it's done to tick it off.

Gather only the smelly towels and fill the washer just halfway.
If the smell is strong, soak them for about an hour in warm water with oxygen bleach dissolved in it, then wash.
Wash in the warmest water the care label allows, skip the fabric softener, and add an extra rinse.
Take them out as soon as the cycle ends, shake them out and spread them open. Don't leave them in the washer.
Hang them with space between them where air moves well so they dry fast. Indoors, use a fan or dehumidifier too.

🧰 By material

① White cotton towels

Oxygen bleach removes both the smell and the yellowing. If the care label allows, diluted chlorine bleach can also be used, but never use it together with vinegar.

② Colored towels

Use a color-safe oxygen bleach and test it on one corner first. Colors can run in warm water, so stick to the temperature on the label.

③ Microfiber towels

Microfiber doesn't tolerate hot water or fabric softener, so wash it separately in lukewarm water and use the tumble dryer only on low heat.

🚫 Don't

Leaving wet towels in the hamper or washer for a long time.
Covering the smell with fabric softener or scented products — the coating builds up and they get mustier.
Using vinegar and chlorine bleach together — it releases toxic gas.

⏳ If it has already dried

For a smell that has set in over time, repeat the oxygen bleach soak and warm-water wash two or three times. On a day you haven't used chlorine bleach, you can try adding a little vinegar to the final rinse.

💡 Tip

Instead of balling up used towels in the hamper, hang them to dry once before they go in the laundry, and they'll smell far less.

❓ Common questions

Will boiling them get rid of the smell?

It works if they're white cotton towels and the care label allows boiling. But if they dry slowly afterward, the smell will come back.

My washing machine smells too.

Detergent residue and mold built up in the drum, rubber gasket and detergent drawer may be the cause. Run a drum-cleaning cycle as the manufacturer directs, and leave the door open after washing to let it dry.

🔗 Related stains

Check the care label firstBleach, wash and dryer symbols explained

🧭 All stains

🧼 Basic rules & cleaning-agent guide

General home methods. For valuable garments or unknown fabrics, take them to a dry cleaner and say what the stain is. Follow product labels for bleaches and solvents, ventilate, and never mix them.