Musty towels usually need more than a normal laundry cycle.
This guide explains how to wash musty towels, what causes the odor, and the best ways to remove detergent buildup, mildew, and bacteria so towels come out fresh.
Why towels develop a musty smell
Towels trap moisture, body oils, soap residue, and skin cells.
When they are left damp in a hamper, washer, or bathroom, microbes such as bacteria and mildew can grow in the fibers and create a stale odor.
Common causes include:
- Leaving wet towels in a pile after use
- Using too much detergent or fabric softener
- Low-water or cold cycles that do not fully rinse residue
- Overloading the washing machine
- Slow drying in humid rooms or without enough airflow
Understanding the cause matters because the solution is not just fragrance.
You need to remove residue and moisture so the odor does not return.
How to wash musty towels the right way
Start with a hot-water wash if the towel care label allows it.
Hot water helps loosen body oils and detergent buildup more effectively than cold water.
Step 1: Shake out and sort the towels
Shake each towel outside or over a bin to remove loose debris.
Wash musty towels separately from clothing so odors and lint do not transfer.
Step 2: Use the right detergent amount
Use a high-quality laundry detergent, but do not overdo it.
Excess detergent can stay in the fibers and feed odor problems.
Follow the label directions for load size and water hardness.
Step 3: Choose the correct wash settings
Select:
- Hot or warm water, if safe for the fabric
- A longer wash cycle for heavily soiled towels
- An extra rinse cycle when available
An extra rinse is especially helpful for removing leftover soap, which is a common reason towels feel stiff and smell stale.
Step 4: Dry them completely
Dry towels immediately after washing.
Use the highest heat recommended on the care label, and make sure the towels are fully dry before folding or storing them.
If you line-dry towels, hang them with space around each piece and good airflow.
Damp towels stored too soon can pick up a musty smell again within hours.
Best cleaning methods for stubborn musty towels
When regular washing is not enough, a deeper cleaning method can help strip odor-causing residue from cotton and microfiber towels.
Vinegar soak
White distilled vinegar can help break down mineral deposits and detergent buildup.
Add one cup of vinegar to a basin or washer filled with warm water and soak the towels for 30 to 60 minutes before washing them again with detergent.
Use vinegar carefully and do not mix it with chlorine bleach.
The two should never be combined.
Baking soda wash
Baking soda can help neutralize odors and soften wash water.
Add about half a cup during the wash cycle with regular detergent.
This works well for towels that smell stale but are not heavily stained.
Oxygen bleach for deeper odor issues
For persistent mildew-like smells, use an oxygen bleach product such as sodium percarbonate, following the label instructions.
Oxygen bleach is often a good choice for white or colorfast towels because it helps lift buildup without the harshness of chlorine bleach.
Chlorine bleach for white towels only
If the towels are white and the care label permits it, chlorine bleach can sanitize and brighten.
Use it sparingly and only as directed.
Overuse can weaken fibers over time.
What not to do when washing musty towels
Some common laundry habits actually make towel odor worse.
- Do not use fabric softener regularly, because it can coat fibers and reduce absorbency.
- Do not overload the washer, or towels may not rinse clean.
- Do not leave towels sitting in the machine after the cycle ends.
- Do not store towels before they are fully dry.
- Do not use too much detergent, since residue can trap odor.
Many people think more soap means cleaner towels, but with absorbent fabrics, less can be more effective.
How to keep towels from smelling musty again
Once the odor is gone, prevention is much easier than repeated deep cleaning.
Good drying and storage habits make the biggest difference.
Dry towels after every use
Hang towels spread out on a towel bar, hook, or drying rack instead of bunching them up.
Bathroom humidity slows drying, so a room with better ventilation is ideal.
Wash towels often enough
Bath towels should usually be washed after three to four uses, and sooner if they stay damp for long periods.
Kitchen towels may need even more frequent washing because they collect food residue and grease.
Use the right laundry load size
Towels need room to move in the washer.
A crowded drum traps dirt and detergent.
If you have a large load, split it into two cycles.
Clean the washing machine itself
A smelly washer can transfer odor back onto clean towels.
Run a monthly cleaning cycle with a washer cleaner or hot water and an appropriate cleaning agent.
Also wipe the door seal, detergent drawer, and drum edges where moisture collects.
When musty towels may indicate mildew
If towels still smell musty after repeated cleaning, mildew may be embedded deeper in the fabric or in the washing machine.
Look for gray spots, greenish marks, or a persistent earthy odor that returns after drying.
In that case, try these steps:
- Pre-soak in warm water with vinegar or oxygen bleach
- Wash again with the hottest safe water setting
- Dry immediately on high heat or in direct sunlight if possible
- Inspect the washer for standing water, gunk, or mold around seals
If the towel fibers feel damaged, thin, or permanently stained, replacement may be the most practical option.
Best towel materials for odor resistance
Material affects how quickly towels dry and how easily they hold onto smell.
Cotton is absorbent and popular, but thick cotton towels can take longer to dry.
Microfiber dries faster, though it can hold onto oils if washed with too much detergent or fabric softener.
Look for towels with:
- Moderate thickness for quicker drying
- Good absorbency without excessive bulk
- Clear care instructions that allow effective washing
No material is odor-proof, but faster drying and proper laundering reduce musty buildup.
Simple towel care routine that works
A reliable towel routine keeps laundry manageable and helps towels stay fresh longer.
Dry towels fully after each use, wash them in appropriate-sized loads, and avoid products that leave residue.
If a towel starts to smell off, treat it early with a vinegar soak, baking soda, or oxygen bleach before the odor becomes harder to remove.