Use the creak in the hair around the time of the start is I think that many people to be worried about, but really clean and wash the hair while carefully massage! Effervescence was using while I think I Na's not good enough, but, although it is written on the bottle as "Shake well before use", I noticed from using about five. . . . When the shake use, I feel that foaming became well. Aroma think I Na might have also not good people, unique flavor (I know you like).