I often find that people aren’t aware that it’s totally acceptable—and sometimes a great idea!—to add a spray leave-in conditioner in addition to your regular conditioner. If your hair is especially dry or damaged, pick two products with different purposes for a double dose of treatment. The leave-in products really boost moisture, reducing frizz and breakage. (One exception is thin, fine hair, which may benefit from only one conditioning treatment to keep things light. I rec