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You can sanitize towels in the washing machine by using the warmest water allowed on the care label, the correct amount of detergent, and a laundry sanitizer or bleach that is safe for the towel fabric. Wash towels separately, avoid overloading the washer, and dry them fully after the cycle.
Sanitizing is not the same as regular washing. Washing removes dirt, body oils, and odors. Sanitizing takes an extra step to reduce germs. Always follow the towel care label and the directions on any bleach or laundry sanitizer you use.
For the underlying hygiene question, review why bacteria can remain on towels after washing before adding products to every load.
What You Need
Choose supplies based on the towel color, fabric, and care instructions:
- Regular laundry detergent
- Chlorine bleach for bleach-safe white towels
- Color-safe oxygen bleach for many colored towels
- A laundry sanitizer approved for the towel fabric
- A washing machine with enough room for the towels to move freely
You do not need to use every product at once. Pick one sanitizing method that fits your towels.
Compare laundry sanitizers for sheets and towels by fabric limits, dose, dispenser stage, and required contact time. The guide to the most effective sanitizer type explains when bleach, a color-safe product, or routine washing is the better fit.
Never mix chlorine bleach with vinegar, ammonia, rubbing alcohol, hydrogen peroxide, or other cleaning products. Mixing cleaners can create dangerous fumes.
How to Sanitize Towels in the Washing Machine
1. Check the Care Label
Read the towel’s care label before choosing the water temperature or sanitizing product.
Look for instructions about:
- Maximum wash temperature
- Bleach use
- Machine drying
- Low-heat requirements
- Special care for decorative trim or delicate fibers
Cotton towels often tolerate warmer washing than microfiber, bamboo-blend, or decorative towels. Product instructions can vary, so follow the current care label.
2. Sort the Towels
Separate towels by color and fabric type.
Wash white towels apart from dark or bright towels, especially when using chlorine bleach. Keep heavily soiled cleaning towels separate from bath towels, kitchen towels, and baby towels.
It also helps to wash towels separately from clothing. Towels need room to rinse, and their rough texture can rub against delicate clothes.
3. Do Not Overload the Washer
Place the towels loosely in the drum. They should be able to lift, tumble, and rinse freely.
An overloaded washer may leave detergent, body oils, and sanitizing products trapped in the fabric. This can make towels feel stiff or smell musty after drying.
For a small washer, split a large towel pile into two loads.
4. Add the Correct Amount of Detergent
Use the detergent amount recommended for your load size, washer type, and water conditions.
More detergent does not always make towels cleaner. Too much can leave residue inside the loops of the fabric. That buildup may trap odors and reduce absorbency.
Because detergent and sanitizer may belong in different stages, check how laundry sanitizer works with detergent before choosing a dispenser.
High-efficiency washers usually require high-efficiency detergent. Check the detergent label for the correct amount.
5. Choose One Sanitizing Method
There are several ways to sanitize washable towels. The right choice depends on the care label.
Method 1: Hot or Warm Water
Select the warmest water temperature the towel can safely handle.
Hot water may be suitable for some white cotton towels, but it can fade colors, shrink certain fabrics, or damage special finishes. Do not assume every towel can be washed on hot.
Water temperature alone may not meet every sanitizing goal. For a more specific level of sanitizing, use a labeled laundry sanitizer or bleach product as directed.
Method 2: Chlorine Bleach for White Towels
Chlorine bleach can be used on many plain white, bleach-safe cotton towels.
Add it through the washer’s bleach dispenser rather than pouring concentrated bleach directly onto the towels. Use only the amount listed on the bleach label.
Do not use chlorine bleach on:
- Colored towels
- Towels labeled “do not bleach”
- Wool or silk
- Towels with bleach-sensitive trim
- Some microfiber or blended fabrics
Repeated bleach use may weaken fibers over time, so it is better used when needed rather than in every load.
Method 3: Oxygen Bleach for Colored Towels
Color-safe oxygen bleach is often a gentler option for colored towels. It can help with odors and stains, but not every oxygen bleach product is labeled as a sanitizer.
Follow the package directions for the washer type, load size, and soaking time. Check the towel label before use, and test bright or dark towels when colorfastness is uncertain.
Method 4: Laundry Sanitizer
A laundry sanitizer may be useful when towels cannot be washed in very hot water or treated with chlorine bleach.
The evidence review of whether laundry sanitizers really work explains why correct dose and contact time matter more than simply adding the product.
Add the product to the washer compartment or rinse cycle specified on its label. Some products need a certain contact time to work as intended.
Do not place the sanitizer in a random dispenser. Follow the current product directions carefully.
6. Run an Extra Rinse When Needed
An extra rinse may help if:
- The towels feel soapy
- The load was heavily soiled
- Someone used too much detergent
- Your washer uses very little water
- A household member is sensitive to laundry residue
An extra rinse does not replace the sanitizing step, but it can remove leftover detergent and product residue.
7. Dry the Towels Completely
Move the towels to the dryer or clothesline soon after the wash cycle ends. Leaving damp towels in the washer can lead to stale odors.
Use the dryer setting allowed by the care label. Cotton towels may tolerate medium or higher heat, while microfiber and some blends often need lower heat.
Make sure thick areas, hems, and folded edges are fully dry before putting the towels away.
Can You Sanitize Towels Without Bleach?
Yes. A labeled laundry sanitizer can sanitize many washable towels without chlorine bleach. Some colored towels may also be washed with oxygen bleach, although oxygen bleach is not always sold or labeled as a sanitizer.
Warm water, detergent, good rinsing, and complete drying can provide a thorough routine wash. When you need a product specifically for sanitizing, check its label to confirm how it should be used.
Should You Use Vinegar to Sanitize Towels?
Vinegar may help loosen some detergent or mineral residue, but it should not be treated as a dependable laundry sanitizer.
It can also affect certain washer parts or towel finishes when used often. Check the washing machine manufacturer’s guidance before adding vinegar.
Never combine vinegar with chlorine bleach.
How to Sanitize Smelly Towels
A musty smell often comes from towels staying damp, being packed too tightly in the washer, or holding detergent and fabric softener residue.
Try this routine:
- Wash the towels separately.
- Use the warmest safe water temperature.
- Measure the detergent instead of pouring freely.
- Add a suitable sanitizer or bleach according to its label.
- Select an extra rinse if the towels feel coated.
- Dry the towels immediately and completely.
If the smell remains, clean the washing machine according to the manufacturer’s instructions. Residue around the gasket, detergent drawer, filter, or drum can transfer odors back to clean laundry.
Common Mistakes to Avoid
Using Too Much Detergent
Excess detergent can stay trapped in thick towel loops. This may make towels stiff, less absorbent, and harder to rinse.
Adding Too Much Fabric Softener
Liquid fabric softener and dryer sheets can leave a coating that reduces absorbency. Use them sparingly or skip them for bath, kitchen, and cleaning towels.
Pouring Bleach Directly on Towels
Concentrated bleach can cause pale spots, holes, or fiber damage. Use the washer dispenser and follow the product label.
Mixing Cleaning Products
Do not combine bleach, vinegar, ammonia, or other household cleaners. Use one approved laundry method at a time.
Washing Every Towel on Hot
Hot water is not safe for every fabric. It may fade dark towels, shrink some blends, or harm microfiber. Check the care label first.
Leaving Towels Damp
Wet towels left in the washer, hamper, bathroom, gym bag, or RV storage area can develop odors. Hang used towels open to dry before placing them in a hamper.
How Often Should Towels Be Sanitized?
Most household towels do not need a separate sanitizing product after every use. A thorough wash with detergent and complete drying is often enough for normal laundry.
Use the guide to whether towels need laundry sanitizer for load-specific reasons to add it, and the broader review of using sanitizer in every wash before making it a routine step.
Consider an added sanitizing step when towels:
- Have a strong musty smell
- Were used for a messy cleanup
- Sat damp for a long time
- Were shared by several people
- Were stored wet in a gym bag or travel bag
- Need extra care based on household circumstances
Kitchen towels, pet towels, cleaning cloths, and bathroom towels may need different washing routines. Keep very dirty utility towels separate from personal towels.
For health-related concerns, follow guidance from a qualified professional rather than relying on bedding or laundry products alone.
How to Keep Towels Fresher Between Washes
Hang towels so air can reach the full surface. A wide towel bar usually allows better drying than a small hook.
In shared bathrooms, give each towel enough space to dry. In dorm rooms, RVs, and small bathrooms, a folding rack or over-door bar may help when wall space is limited.
Other helpful habits include:
- Do not place wet towels in a closed hamper.
- Wash towels before odors become strong.
- Clean the washer regularly.
- Leave a front-loading washer door open after use when the manufacturer permits it.
- Store only fully dry towels.
- Avoid packing damp towels into a linen closet.
For a practical baseline that separates softness, whitening, rinsing, and drying from sanitizing, review how hotels keep towels white and fluffy.
Frequently Asked Questions
What washing machine setting sanitizes towels?
Use the warmest water and longest suitable cycle allowed by the towel’s care label. Add a laundry sanitizer or bleach product when appropriate, following its directions. A washer’s sanitize cycle may use very high heat and may not be safe for every towel.
Can I sanitize colored towels?
Yes. Use a laundry sanitizer approved for colored fabric or another color-safe method listed on the product label. Avoid chlorine bleach unless both the towel care label and bleach instructions say it is safe.
Does hot water alone sanitize towels?
Hot water helps with cleaning, but the result depends on the actual water temperature, cycle length, fabric, and washer. For a specific sanitizing claim, use a product or washer cycle labeled for that purpose and follow its instructions.
Can I use bleach and laundry sanitizer together?
Do not combine laundry chemicals unless both product manufacturers clearly state that the combination is safe. In most cases, choose one sanitizing method and follow its label.
Why do my towels still smell after washing?
The washer may be overloaded, the towels may contain detergent buildup, or they may have stayed damp too long. Use less detergent, wash a smaller load, add an extra rinse, dry the towels promptly, and clean the washer if needed.
Can microfiber towels be sanitized?
Many microfiber towels can be sanitized, but high heat, chlorine bleach, and fabric softener may damage some types. Check the care label and use a sanitizer approved for synthetic fabrics.
Should towels be washed separately from clothes?
Washing towels separately gives them more room to rinse and helps prevent lint or rough towel fibers from affecting clothing. It is especially useful for bulky loads, dark towels, cleaning towels, and heavily soiled towels.
Do Towels Hold Bacteria Even After Washing? A 4.5-cubic-foot washer is a common bedding starting point, but item labels, model limits, usable drum space, balance, and wet load determine fit. Compare six compact washing machines for sheets and towels by tub capacity, cycles, water levels, sink setup, spin action, drainage, and storage size.
