I have really, really dry hair - which is strange because when I was a teenager I had really greasy hair.  I think the dryness of my hair and skin has something to do with my job - Flight Attendant.  I was using so many "potions" to moistuize my hair, buying so many really expensive conditioners and nothing was working on my dry, sometimes painful scalp.  I didn't have flakes, but my scapl would hurt it was so dry at times.  So I decided to try out Head and Shoulders Dry Scalp Shampoo.  It was inexpensive, easy to find, and it worked!  I lather up real good with the shampoo, rinse, then...