Should an ampoule be placed after washing and overlapping or after washing and washing?

Good day. The ampoule should be placed on freshly washed and towel dried hair. Apply the treatment by spraying it throughout your hair from roots to ends.
, Massage the serum lightly, then dry with hair dryer - the heat from the dryer ensures the active principles get into the structure of the hair. Apply 1 ampoule every 2 days for 30 days.