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Stop Leaving the Remains of the Day on Your Face

What you used to do: You did the bare minimum of washing your foundation off before bed, but you left your eye makeup on. (Today's mascara is tomorrow's eyeliner, right?)

Why that's a bad idea now: It's never a great idea to go to bed with makeup on, but since your eyes are one of the first areas of the face to show the signs of age, it's a particularly bad move to let eye makeup sit overnight now, says Elizabeth Tanzi, MD, a clinical associate professor of dermatology at George Washington University and the founder and director of Capital Skin and Laser in Chevy Chase, Maryland. "You don't want to give your eyes any extra reason to be puffy or irritated or red," she says. "Plus, the tiny glands around your eyes and eyelashes can get clogged up, which also leads to irritation."

What to do instead: Scrubbing at your eyes isn't recommended, and many face washes, especially those with active ingredients like glycolic acid, could really sting if they get into your eyes. So use an eye-specific makeup remover that's gentle but strong enough so that you don't need to rub at the area. You should also consider using an eye cream at night to help plump, lighten and brighten the area, says Tanzi.