First and foremost, apply only light pressure when rolling; pushing down too hard can damage the delicate capillaries in your face, cautions Snyder. The direction you roll also matters. “Follow the contours of your face, moving outward and downward, and don’t forget to roll your neck to help flush out anything you’ve moved out of your face,” says Snyder. Applying a serum or moisturizer to your skin pre-rolling is a good idea, and be sure to clean your roller afterward; soap and water or rubbing alcohol work well, she says.