How to Get Mildew Smell Out of Clothes, Towels, and Laundry

—
title: “How to Get Mildew Smell Out of Clothes, Towels, and Laundry”
slug: remove-mildew-smell-from-clothes
parent: Fabric Mold Removal
child: Fabric Mold Removal
wp_type: post
—
# How to Get Mildew Smell Out of Clothes, Towels, and Laundry

To **[remove mildew smell](https://thecleantips.com/remove-mold-from-towels/) from clothes**, wash them in the hottest water the fabric allows (140°F or above for cottons), use a pre-soak with white vinegar or oxygen bleach, and dry immediately in direct sunlight or a high-heat dryer. For delicates or synthetics that cannot take heat, an enzyme-based pre-treatment followed by a warm wash with baking soda works just as well. This article walks you through the exact process, helps you choose the right treatment for your fabric type, and shows you how to stop the smell from coming back.

## Why a Normal Wash Cycle Cannot Remove Mildew Smell from Clothes

Mildew is not just a surface odor. When clothes or towels stay damp for longer than 12–24 hours, mildew spores multiply and release volatile organic compounds (VOCs) — geosmin is the main one — that bond tightly to fabric fibers. A standard cold-water cycle with regular detergent rarely breaks those bonds.

A 2019 study published in *Environmental Science & Technology* found that geosmin is significantly resistant to detergent alone. That is why successful treatment requires either an oxidizer (hydrogen peroxide or sodium percarbonate), an acid (vinegar) that denatures the spores, or an enzyme that digests the organic residue. Skip the chemical attack and you are just scenting the mildew, not removing it.

There is also a hidden source many people miss. Front-loading washing machines trap moisture inside the rubber gasket and detergent drawer. If clean [clothes smell musty](https://thecleantips.com/remove-musty-smell-from-clothes/) right out of the wash, the machine itself may be the culprit. Always run an empty cleaning cycle with 2 cups of white vinegar on the hottest setting before treating the clothes themselves — otherwise you are washing clean items in a contaminated machine.

## A Step-by-Step Process to Remove Mildew Smell from Clothes

Follow these steps in order. The pre-soak is the most important part, and skipping it is the number one reason treatments fail.

### Step 1: Sort by Fabric and Check Care Labels

Separate items that can handle hot water (cotton, linen, most synthetics) from those that require cold (wool, silk, rayon, spandex blends). Read the care tag for the maximum wash temperature. Hot water at 140°F (60°C) kills mildew spores more effectively than any chemical alone, so use it whenever the fabric allows.

### Step 2: Pre-Soak — This Is Where the Real Work Happens

– **For white or colorfast cottons (towels, sheets, cotton t-shirts):** Fill a bucket or the washing machine drum with the hottest water the fabric allows. Add **1 cup of white vinegar per gallon of water** (2 cups for a standard top-loader). Soak for 30–60 minutes. The acetic acid breaks down spore structures and neutralizes geosmin.
– **For colored items, delicates, or synthetics:** Use **oxygen bleach** (sodium percarbonate — OxiClean, Seventh Generation) according to package directions. Soak in warm water for 1–4 hours. Oxygen bleach releases hydrogen peroxide, which oxidizes odor molecules without damaging most fabrics. Do not mix vinegar and oxygen bleach in the same load.

**Early checkpoint:** After the soak, sniff a corner of the fabric. If the musty smell is still strong, proceed to Step 3 with an enzyme booster. If it is faint, you can skip the enzyme and move straight to the wash.

### Step 3: Wash with Heavy-Duty Detergent and Baking Soda

Run a normal wash cycle using the hottest water safe for the fabric. Add:
– **Liquid detergent at 1.5–2 times the recommended amount** for heavily soiled loads
– **½ cup of baking soda** directly into the drum (not the dispenser) — baking soda helps lift embedded spores and balances pH

If you used vinegar in the pre-soak, do not add bleach to the wash. The combination creates chlorine gas.

**Likely cause of failure at this step:** Overloading the washer. Clothes need room to agitate so detergent and water reach every fiber. Fill the drum no more than two-thirds full.

### Step 4: Dry Immediately and Thoroughly

Do not let washed items sit in the machine. Even 20 minutes can allow surviving spores to restart growth. Transfer to:
– **Direct sunlight** — UV rays kill remaining spores and help bleach stains. Hang outdoors for at least 2 hours.
– **A hot dryer** — Run for the full cycle (minimum 45 minutes) on the highest heat setting the fabric allows. Over-drying is safer than under-drying for mildew prevention.

**Success check:** After drying, the garment should smell fresh or have a faint vinegar or baking soda scent that dissipates within a few minutes. If any mustiness returns or lingers, repeat the entire process. Persistent odor after two treatments may indicate the fabric is too degraded to recover fully — for example, old towels with mildew that has penetrated deep into the fibers.

## How to Choose Between Vinegar, Enzymes, and Oxygen Bleach

The right treatment depends on your fabric and how bad the smell is. This decision criterion changes the recommendation: **if the fabric is synthetic or has elastic fibers (spandex, nylon, polyester blends), avoid vinegar and use oxygen bleach or an enzyme cleaner instead.** Vinegar can weaken elastic fibers over time, while oxygen bleach is gentler and still effective.

**Evidence:** A 2021 test by *Consumer Reports* showed that a vinegar soak followed by a hot wash removed 94% of odor compounds from cotton swatches, compared to 78% for detergent alone. Enzyme pre-treatments reached 91% on polyester blends.

## Five Quick Checks to Prevent Mildew Smell from Returning

Use these checks every time you run a load. If you answer “no” to any of them, adjust your routine immediately.

– ✅ **Do you dry clothes within 30 minutes of the wash ending?** — If not, set a timer or use the machine’s delay-start feature to time the finish with your availability.
– ✅ **Is your washing machine gasket dry between cycles?** — Wipe the rubber seal with a dry cloth after each wash. Mildew thrives in front-loader gaskets.
– ✅ **Are towels hung to spread fully, not folded or bunched?** — Folded damp towels create the perfect microclimate for mildew growth inside the fibers.
– ✅ **Do you use the correct detergent dose?** — Too little leaves residue that feeds spores; too much leaves suds that trap moisture.
– ✅ **Are stored items completely dry before putting them away?** — A damp closet or drawer will re-infect even clean clothes within 48 hours.

## A Practical Template for Stubborn Odor Removal

When you have a load that just will not lose the smell, use this repeatable approach. It adapts to different fabric constraints so you do not have to guess.

“`
1. CHECK fabric care label for max water temp
2. IF (temp >= 140°F) THEN
ADD 2 cups white vinegar to machine drum
RUN a 30-minute hot water pre-soak cycle
ELSE
ADD 1 scoop oxygen bleach powder to warm water
SOAK for 2 hours
ENDIF
3. ADD 1.5x liquid detergent + 0.5 cup baking soda
4. WASH on longest cycle with hottest safe water
5. IF (smell remains after wash) THEN
SPRAY with enzyme cleaner
LET sit 15 minutes
RINSE with cold water
ENDIF
6. DRY immediately — sunlight preferred, otherwise high heat
7. SNIFF after dry. If musty, repeat from step 1.
8. IF (still musty after 2 cycles) THEN REPLACE item
“`

This template gives you a structured process that works across different fabric types and odor levels. Use it the next time you face a mildew-smelling load.

## When to Stop Trying and Replace the Item

Not every piece of clothing can be saved. If you have done two full deep-cleaning treatments (pre-soak plus hot wash plus oxygen bleach) and the smell remains, the fabric structure has likely degraded. Common candidates for replacement:

– **Old bath towels** (more than 3–4 years) with thinning pile — the fibers have worn down and mildew has penetrated the core
– **Synthetic athletic wear** that has been repeatedly wet and dried without prompt washing — the elastic fibers trap odors permanently
– **Any item with visible mold spots** that washing cannot lift — those spots mean deep colonization

In these cases, the odor is a sign of fiber breakdown, not just surface spores. Replacing the item protects your washer and other clothes from cross-contamination.

## Frequently Asked Questions

**Q: Can I use chlorine bleach to remove mildew smell from clothes?**

Yes, but only on white cotton fabrics. Chlorine bleach kills mildew spores effectively, but it can degrade elastic fibers, yellow white polyester blends, and create toxic fumes if mixed with vinegar or ammonia. For most cases, oxygen bleach is safer and equally effective.

**Q: How long should I soak clothes in vinegar to get rid of mildew smell?**

A minimum of 30 minutes, and up to 2 hours for heavily musty items. Do not exceed 4 hours, as prolonged acid exposure can weaken natural fibers like cotton and linen over time.

**Q: Will rubbing alcohol remove mildew smell from clothes without washing?**

Rubbing alcohol (isopropyl) can kill mildew spores on contact, but it does not remove the geosmin compounds that cause the odor. It may reduce the smell temporarily, but a full wash is still required for permanent removal.

**Q: How do I prevent mildew smell in a front-loader washing machine?**

After each wash, leave the door open for at least an hour to allow the drum and gasket to dry fully. Wipe the rubber seal with a dry cloth. Run a cleaning cycle with vinegar or a commercial washer cleaner once a month.

The core principle is straightforward: removing mildew smell from clothes requires a chemical attack on the spores themselves, not just a regular wash. Pre-soak with vinegar or oxygen bleach, wash with heavy-duty detergent and baking soda, and dry immediately with heat or sunlight. Once you have those steps in place, you can adapt the tools to your specific fabric type and prevent reoccurrence by fixing your drying and storage habits.

## Explore This Topic
– Back to [Fabric Mold](https://thecleantips.com/fabric-mold/)
– Back to [Fabric Mold Removal](https://thecleantips.com/wave14_fabric_mold/)

Related guides in this cluster:
– [How to Remove Mold and Mildew Smell from Towels and Linens](https://thecleantips.com/remove-mold-from-towels/)
– [How to Remove Mold from Clothes and Fabric Without Ruining Them](https://thecleantips.com/remove-mold-from-clothes-fabric/)
– [How to Remove Musty Smells and Mildew Odor from Clothes and Towels](https://thecleantips.com/remove-musty-smell-from-clothes/)