Use two mirrors : Coloring the back of your head can be tricky. As you apply dye in front of your bathroom mirror, hold up a handheld one to ensure you don't miss spots, Hill recommends. Have cleansing cloths on hand : Use wipes like Neutrogena Makeup Remover Cleansing Towelettes to soak up any dye splatters as they happen. If you wait until you're done, they may have already set. ("I still have stains I can't get off!" one tester sighed.)
Section, section, section. To avoid patchiness, create a middle part that runs to the back of your head and split the hair into four sections two in front of the ears and two in back. "Always apply the dye from back to front," says colorist Aura Friedman, of the Sally Hershberger Downtown salon in New York City. "That way the dye is sitting on the back of your hair the longest, which is naturally darker than the front anyway."