Shampoo instructions are a set of guidelines for properly washing and caring for one's hair. The two crossword solutions, RINSE (5 letters) and REPEAT (6 letters), are both important steps in the shampooing process. Rinsing involves thoroughly washing the hair with water to remove any dirt or product residue. Repeating the shampooing process is necessary to ensure that the hair is completely clean and free of any remaining dirt or product. Following these two steps will help ensure that the hair is properly cared for and looks its best.