Amazon has the Zout Triple Enzyme Formula Laundry Stain Remover Foam, 22 Fl Oz for only $2.93 Shipped when you use subscribe and save. The first enzyme helps remove tough protein stains such as blood, grass and sweat. The second enzyme works on starch stains like tomato & bbq sauces. The third enzyme targets oily stains like salad dressing, and margarine.Â