Okay, so you may already be an expert on layering your skin care products. But, what about your hair care? Turns out, there's an order of application that can optimize those products, too. We caught up with Chaz Dean, creator of WEN Hair Care—you know, that guy on QVC who convinced you to try cleansing conditioner—and got the scoop: "With skin care, you apply the lightest product to the heaviest; the reverse is true for hair care,” he says. "Applying in this order keeps your hair feather light.” Check out his breakdown, below.