Drape your goose down-filled clothing over a drying rack, if it's wet, and allow it to air-dry outdoors or near an open window. If mold spores or odor are present, air-dry the clothing in direct sunlight.
Launder your goose down-filled clothing in the washing machine with warm water. Add mild detergent to the wash cycle to clean the clothing. Pour 1 cup of white vinegar into the rinse water to deodorize the garment.
Remove the down clothing from the washing machine promptly. Place it in the dryer. Add two towels to absorb moisture and two or three unused tennis balls to fluff the down during the dryer cycle and prevent it from lumping in one area.
Position the drying rack in a sunny location. Lay the down-filled clothing over the top of the drying rack to distribute the weight evenly.
Air-dry your goose down-filled clothing completely. Turn the garment over to ensure both sides are completely dry.
Hang your down clothing on a padded hanger and store in a dry location to prevent moisture absorption.