Even if it's just a coat of mascara and a swipe of tinted lip balm, makeup is something we usually start our days with. And while no makeup routine is created equal, there are some important steps to take to make sure you're applying your makeup in a way that's going to make your face as healthy as it is gorgeous. Is it really a problem to not clean your makeup brushes? Does it matter if your makeup is a few months past its expiration date? Rita Ghazarian of Lift MD Aesthetics shares the scoop. Just keep reading.