The method used to remove any stain from clothing depends upon what caused the stain, according to the American Cleaning Institute. For example, fresh blood stains need to be soaked in cold water before laundering. Do not use hot water because it sets blood stains. Pretreat dry blood stains with a commercial product, or soak the garment in warm water along with a product that contains enzymes before washing.
Pretreat chocolate stains, or prewash the item in warm water with a product containing enzymes before laundering.
Pretreat any stain from bodily fluids, or soak with an enzyme product. Launder the item using oxygen bleach or a bleach containing sodium hypochlorite, if the bleach is safe for the fabric.
Pretreat baby formula stains, or soak the item with an enzyme product. If it is an older stain, soak the stain for at least 30 minutes before washing. Older stains may require several hours of soaking.
Pretreat or soak grass stains in an enzyme product before washing.
The American Cleaning Institute emphasizes checking to make sure the stain is actually gone before placing the item into the dryer. If not, launder the item again. Heat from the dryer can permanently set some types of stains into the fabric.