Wash your hair more often, and make sure that you get it clean when you do. With oily hair, wash once, then rinse and wash again. Leave the shampoo on for several minutes to give the detergent time to remove the dirt and oils, says Dr. Walters. Try a dandruff shampoo. Shampoo your hair with a dandruff shampoo that contains coal tar derivatives, even if you don't have dandruff.
Dandruff shampoos tend to dry out even the oiliest hair.
As an added bonus, coal tar has a natural conditioning effect, which adds softness and shine without adding the oils contained in man-made conditioning products. This eliminates the need for adding any conditioners to detangle or add shine, says Wendy Resin, hair-care manager at the Neutrogena Corporation in Los Angeles. Cut down on conditioners. Alternate with a clarifying shampoo. Every other shampoo, use a shampoo that's high in cleaning agents such as sodium lauryl sulfate and low in any kind of conditioners such as lanolin, says Dr. Walters.