High-tech workout clothes that wick away moisture from your body tend to retain a strong odor after a while. The reason? Since the fabric is designed to repel water, it repels water when you’re washing it. As natural body oils stick to the fabric, barriers are created that make the synthetic fabric almost impossible to get clean. The eco-trick to cleaning workout clothes is to soak them in cold water with one cup of white vinegar before tossing them in the washing machine. The acids in white vinegar will break down the oils and help penetrate the fibers of the clothes.