There are several treatments you can use to eliminate the mildew. If its a dryclean only item or specialty fabric, you'll want to bring it to a professional. If it's washable, try one or more of these remedies in order, making sure to test each solution on an inconspicuous spot first to make sure it doesn't damage the item.
- Moisten the stain with lemon juice, spread salt over the lemon juice and place out in the sun to dry. Rinse thoroughly after the item is dry.
- Soak in straight vinegar, and line dry. Rinse thoroughly after drying.
- Soak the stained area with a solution of one tablespoon of sodium perborate bleach and two cups of hot water, allowing the solution to sit for 30 minutes. Launder as usual, but line dry.
- Chlorine bleach may also combine 2 tablespoons of chlorine bleach with one cup of water and allow the solution to sit on the stained area for 15 minutes, then rinse and launder as usual.