Again, when in doubt, hand wash rather than machine wash. This is not only gentler on fabrics, it will keep the stain isolated to one garment. Drying method Again, when in doubt, air dry, rather than machine dry.
Machine drying, especially at high temperatures, can set the stain.
Test for colorfastness by applying a small amount of whatever stain remover you're using on a hidden area of the fabric. Sometimes the best nest step is to consult a professional.