Why Your Gym Clothes Still Smell After Washing — and How to Fix It

Step-by-Step: How to Get the Odor Out of Workout Clothes

Here's the full routine for getting the stink out of gym clothes. This works for polyester, nylon, spandex, and blended workout fabrics.

1. Pre-soak in vinegar. Fill a basin, sink, or bucket with cold water and add white vinegar at a ratio of about one part vinegar to four parts water. Submerge your gym clothes and let them soak for 30 minutes. The acidity of the vinegar breaks down the body oils and kills odor-causing bacteria that detergent alone misses. Drain and move to the wash.

2. Turn everything inside out. Most of the bacteria, oils, and sweat compounds are concentrated on the inside of the garment — the side that was pressed against your skin. Turning clothes inside out exposes that side directly to water and detergent during the wash cycle.

3. Wash with cold water and less detergent than you think. Use about half the amount of detergent you normally would. More soap does not mean cleaner clothes. Excess detergent leaves residue in synthetic fabric that traps the exact compounds you're trying to remove. Cold water is better for workout clothes because hot water can set odors into synthetic fibers and break down the elastic over time.

Use a detergent that's free of toxic fragrances, dyes, and optical brighteners, which leave residue on fabric that traps odor-causing bacteria. Truly Free Home Laundry Wash skips all of those and cleans without adding new residue back into the fibers. For extra odor-fighting power, pre-treat problem areas with Truly Free Home Laundry Stain Spray, which uses bio-based enzymes to break down the protein-based compounds (sweat, skin oils, bacteria) that cause the smell.

4. Skip fabric softener. Fabric softener coats fibers with a waxy layer. On workout clothes, that coating seals in odor-causing bacteria and reduces the fabric's moisture-wicking ability.

5. Air dry. Hang gym clothes to dry or lay them flat. High dryer heat can bake residual odors into synthetic fibers, making them even harder to remove. Air drying also extends the life of the elastic in your workout gear.

Pro Tips to Get Sweat Smell Out of Workout Clothes

A few extra habits that make a noticeable difference:

• Don't let sweaty clothes sit in a gym bag or hamper. The longer damp workout clothes sit balled up, the more bacteria multiplies. Hang them up to air out as soon as you get home, even if you're not washing them right away.
• Wash workout clothes separately from regular laundry. Heavier items like towels and jeans can prevent gym clothes from agitating freely in the wash, which means less thorough cleaning.
• Add baking soda to the wash. A half cup of baking soda added directly to the drum neutralizes odor compounds during the wash cycle. It works well alongside vinegar pre-soaking.
• Don't overstuff the machine. Workout clothes need room to move so water and detergent can circulate through the fibers. A packed machine means less contact with the cleaning solution.