Keeping your delicate corkscrews healthy is all about conditioning, conditioning, conditioning. In fact, Kiehl's strongly recommends that curly heads shampoo as infrequently as possible—ideally, no more than every other day—and always condition after cleansing. Extra tip: Not fully rinsing that conditioner out of your hair is actually a good thing. It will help to detangle your ringlets and provide that extra hydration curls crave. And every bit of conditioning fights the curl's worst enemy: frizz.