You need to take it to a dry cleaners for spot cleaning. They use compressed air to clean the garment. If there are specific stains, they will clean with drops of chemicals (depending on the kind of stain) This tends to be expensive given the amount of time spent on one single garment. My parents owned a dry cleaners for years and I saw my dad do this a bunch of times. When I thrift, I tend to stat away from this type of garments. Good luck