Translations:Adventist Youth Honors Answer Book/Outreach/Christian Grooming & Manners/43/en
From Pathfinder Wiki
9. Describe the proper way to wash your hair and care for your "hair tools."
Wet your hair thoroughly, being sure it is wet all the way to the scalp. Pour 15-30 ml of shampoo into the palm of your hand, and then work it into the hair to form a lather. Lather the hair until all surfaces have been washed. Rinse thoroughly - if any shampoo is left in the hair, it will dry in place forming clumps of yellowish flakes.