For cotton and polyester: Do not put items stained with gasoline or other flammable materials into a washing machine. Check washing machine warning labels (usually located inside the lid) for instructions specific for your washing machine. If stain is still wet, cover with baking soda to absorb moisture and odor. Brush off excess. Rinse the garment in cold water to dilute the stain. Rub liquid dish soap, such as Dawn, into the stain. Mix a solution of ½ cup liquid laundry detergent with bleach alternative per one gallon of water in a plastic bucket. Add one cup baking soda to neutralize odors. Soak garment for 30 minutes. Discard solution appropriately, as you would gasoline. Rinse garment again in warm water. If stain and/or odor remains, hand wash in warm water with liquid laundry detergent and baking soda.
For washable silk and wool: If stain is still wet, cover with baking soda to absorb moisture and odor. Brush off excess. Flush stain with cold water. Apply liquid dish soap, such as Dawn, and let sit for 10 minutes. Flush with water again. If stain does not begin to fade, take garment to a dry cleaner.