hair before blow drying, i hold the bottle a few inches away from the ends of my hair and spray through, then brush through the lengths and ends so it's evenly distributed. i love the 'mist' aspect as it really does make it so lightweight and easy to apply. it also smells divine (bonus). once blowdried, my hair feels so feather light, soft and shiny, something i'd never found before. i honestly noticed a huge difference in my hair from first use and i never leave it out of my routine now. even if i let my hair dry naturally i use some just for piece of mind that my 