Nighttime Whitening Step 1: Use a Cleanser to Wash for Snow-white Skin. The dry and cold of winter can make your complexion look dull and lifeless, and applying countless layers of whitening products will be in vain. Therefore, it's essential to thoroughly clean your face before bed. It's also important to use lukewarm water to remove the skincare products, makeup, and dust accumulated during the day... Nighttime Whitening Step 1: Use a Cleanser to Achieve Snow-white Skin.