How Often Should You Really Wash Bath Towels Before They Smell?
A bath towel that one healthy person uses and that dries completely between uses can go a few uses. Wash it right away if it stayed damp, smells, was used after a workout, or someone in the house is sick.
You’ll often see “every three uses” or “once a week,” but no US health agency publishes a number. What the Centers for Disease Control and Prevention (CDC), the Environmental Protection Agency (EPA), and ENERGY STAR do give are the conditions that change the answer. This guide is built from those.
Why the calendar is the wrong measure
A towel that dries in a few hours on a spread-out bar and one that stays damp all day on a crowded hook are not the same towel by day three. The counting rule people repeat assumes the first kind.
A musty smell is a sign the towel stayed damp too long. That’s why “wash it when it smells” runs behind. The useful question each morning is whether the towel dried completely since you last used it.
Wash now or reuse? A decision table
| Situation | What to do | Why |
|---|---|---|
| Still damp from yesterday, or damp in the folds | Wash it | Drying is the whole basis for reuse |
| Smells musty or sour | Wash it, and check your washer if it smells right after washing (see below) | The smell means it’s past due |
| Used after a workout, practice, or sports | Wash and fully machine-dry after each use | CDC’s guidance for athletes |
| Shared with someone else | Stop sharing; give each person their own | CDC says avoid sharing towels and washcloths |
| Someone in the house is sick | Wash, and consider hot water temporarily | ENERGY STAR notes this as a reason to switch to hot |
| Someone has a skin infection | Their towels stay theirs; wash after use | CDC says MRSA can survive on towels for hours, days, or even weeks |
| One user, fully dry, no smell, and no other row applies | Fine to reuse for a few uses | No agency sets the exact count |
Help it dry, and it lasts longer between washes
How fast a towel dries depends on the bathroom as much as the towel.
- Ventilate during the shower, not just after. EPA’s moisture guide says to run the bathroom fan or open a window when showering.
- Watch the humidity. EPA recommends keeping indoor relative humidity below 60%, ideally 30–50%. A cheap hygrometer will show whether your bathroom drops back into that range after a shower or stays muggy for hours.
- Spread it out. A towel folded double over a bar or bunched on a hook has a damp core long after the outside feels dry. Open it fully, with air space between towels on a shared rack.
- Move it if the room can’t dry it. If the bathroom has no fan or window, hang the towel in a drier room.
For a sense of how long is too long: EPA’s mold guidance says to dry water-damaged items within 24–48 hours to prevent mold growth. That guidance is about water damage, not towels. Still, a towel that’s damp the next morning, and the morning after, is on the wrong side of it.
Workout towels and shared towels
The most specific towel guidance in these sources is the CDC’s advice for athletes. Wash towels, uniforms, and clothing after each use, and dry them completely in a dryer, not on a line or rack. Follow the care label. Shower right after exercise, and don’t share towels or bar soap.
At home, sharing is the towel risk the CDC actually addresses. It tells everyone, not just athletes, to avoid sharing towels, washcloths, and razors. It says MRSA, a drug-resistant staph bacterium, can survive on towels for hours, days, or even weeks.
Give each person their own bath towel and a hook or bar spot they can recognize. Color-coding helps in houses with kids.
For hands, the CDC’s last handwashing step is to dry them with a clean towel or an air dryer. A hand towel the whole household uses is a shared towel too, so it’s worth washing more often than a bath towel.
Hot, warm, or cold water?
Towels don’t need hot water for every load. ENERGY STAR’s figures show what it costs:
| Setting | Energy compared with hot | When it makes sense |
|---|---|---|
| Hot | Highest: water heating is about 90% of a washer’s energy use | Temporarily, when someone in the house is sick |
| Sanitary cycle | Increases energy use significantly | Only when you need it |
| Warm | Switching from hot to warm can cut energy use in half | Oily stains, which ENERGY STAR says may need warmer water |
| Cold | Lower still | Most loads; ENERGY STAR says cold generally does a good job of cleaning |
A few more ENERGY STAR points help towels in particular. Washers use about the same energy whether full or half full, so run full loads. Use a high spin speed: it pulls more water out of thick terry and shortens drying time.
If towels smell musty right out of the wash
That often points to the washer, not your reuse habits. ENERGY STAR suggests leaving a front-loader’s door ajar for an hour or two after each load so the drum and gasket dry out. Keep children away from the open machine.
Follow your washer manufacturer’s cleaning instructions. ENERGY STAR notes that some makers recommend a monthly normal cycle with bleach to limit mold and mildew.
If you clean with bleach, never use vinegar or any other acid in the same cycle or right after it. Poison Control warns that bleach mixed with acids releases toxic chlorine gas. Use one, run a rinse, then the other.
Our troubleshooting guide on laundry that still smells musty after a full wash goes step by step through the washer, detergent, and drying causes.
Make it a routine
The easiest way to stop agonizing over towel-by-towel decisions is to give towels a fixed slot. Wash them with your other towels on a set day, and pull any towel that fails the table above out early. Our 15-minute weekly home reset shows one way to build laundry into a routine. For clothes that aren’t towels, see what to do with clothes you wore once.
FAQ
Can I use the same towel all week if I hang it up?
Hanging it helps only if it dries completely each time. If it’s still damp in the folds the next morning, it needs washing no matter what day it is. If it dries fully and only you use it, a few uses is reasonable, but no agency sets the exact count.
Is it fine for my partner and me to share a bath towel?
The CDC advises against sharing towels and washcloths, because MRSA can survive on towels for hours, days, or even weeks. Separate towels cost little and remove the question.
Do towels need hot water to get clean?
Not for most loads. ENERGY STAR says cold water generally cleans well and that dropping from hot to warm can cut washer energy use in half. Switch to hot temporarily when someone in the household is sick.
Sources
- Preventing MRSA (CDC) — don’t share towels or washcloths; MRSA survives on towels for hours to weeks
- Athletes: MRSA Prevention and Control (CDC) — wash and machine-dry towels after each use; don’t share towels
- About Handwashing (CDC) — dry hands with a clean towel or an air dryer
- Clothes Washers (ENERGY STAR) — water heating share, hot vs. warm vs. cold, hot water when someone is sick, front-loader door, monthly cleaning cycle, spin speed
- A Brief Guide to Mold, Moisture and Your Home (EPA) — bathroom ventilation, 30–50% humidity, the 24–48-hour drying window
- Chlorine gas (Poison Control) — never mix bleach with acids such as vinegar
Written and reviewed by peter.bae for Hearth & Habit · Last reviewed October 11, 2026
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