Rinse the stain with cold water as soon as possible
Mix baking soda with a little water to form a paste
Apply the paste to the stain and let it sit for 30 minutes
Gently rub the fabric together or use a soft brush
Wash with laundry detergent in the warmest water safe for the fabric
For white fabrics, use hydrogen peroxide or oxygen bleach
For colored fabrics, test any stain remover on a hidden area first
Soak the item in a solution of water and white vinegar before washing
Avoid using hot water until the stain is removed
Air-dry the item and check that the stain is gone before using a dryer
Repeat the treatment if needed