We know, we know: Cleaning your makeup brushes can be a major pain. They take forever to wash, even longer to dry, and then the bristles start falling out. But if you were to take a black light to those un-washed makeup brushes, you'd probably never let them touch your face again. Dirty makeup brushes can even be the cause behind acne that won't go away. We spoke with Elaina Badro, internationally recognized makeup artist and the mastermind behind the Elaina Badro Brush Collection, and Lissette Waugh, founder of L Makeup Institute to get the 411 on cleaning makeup brushes (and the mistakes we're all making).