If those fibers are really trapping some stink, let them soak in the sink in a solution of cool water and 1 cup baking soda for a minimum of 30 minutes.
Prep the washer
Toss an Active Wash Laundry Pod into the bottom of the machine.
Set the washing machine’s settings so it runs on the gentle cycle and uses cold or cool water.
The heat of a clothes dryer can damage elastane fibers. Opt to air-dry if you can! If you must use a machine, set it as low as possible, and remove the clothing while still slightly damp.
Never use fabric softener or dryer sheets when washing spandex.
Products to treat Spandex stain:
Active Wash Laundry Pod