Splash with Care

Here's the cold, hard truth: Rinsing your face with icy water won't tighten your pores. And using hot water, though it may feel good, can dehydrate skin. Lukewarm is best, and if you have redness, try cool — not cold — water, to help constrict blood vessels, Waldorf says. What can impact your skin is hard water (check your supply with a simple water-testing strip, available at the hardware store). "Over time, it can cause skin irritation," Baumann says. "Putting a purifier on your bathroom sink will filter out some of those harsh minerals."