I have short hair that very oily.i put shampoo every third day but yet it comes back to its normal kind when i leave it without shampooing for some days.and then shampooing and conditioning my hair becomes a daily affair .when my aunt heard about this that she told me not to waste my time in using such useless shampoos and get hold of Head And Shoulders Shampoo.since i have white flakes on my hair i want to know that will Head And Shoulders Shampoo help remove these flakes from my hair?and how much of Head And Shoulders Shampoo do i need to use in a day for dazzling results?