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You're overcleaning your skin.

After a night of sleep, your skin needs to be woken up—not stripped of its natural oils via a medicated cleanser. "The number one thing that makes your face look older is being overly dry," says Julius Few, MD, director of the skin clinic at The Few Institute for Aesthetic Plastic Surgery. Aside from drying due to arid winter air, oil production in your skin also decreases as you age, exacerbating parchedness. The result? More visible wrinkles and pores, and a duller appearance, says Few. He recommends washing your face at night to get skin clean, but using only a lukewarm splash of water in the morning.