Air the clothes outside in fresh air for several hours
Hang them in a well-ventilated area
Wash with regular detergent and add baking soda
Add white vinegar to the rinse cycle
Use an odor-removing laundry booster
Soak the clothes in a mixture of water and vinegar before washing
Wash with the hottest water safe for the fabric
Dry completely in direct sunlight if possible
Repeat washing if the smell remains
Place dry clothes in a sealed bag with baking soda or activated charcoal overnight
Use a fabric-safe odor eliminator spray
Avoid storing the clothes with other clean clothes until the smell is gone