Beat the dull winter skin blues with the Murad AHA/BHA Exfoliating Cleanser ($21, originally $42). This exfoliating face wash is packed with three acids — salicylic acid, lactic acid, and glycolic acid — to unlock your most radiant skin yet. Just make sure you don't overdo it and stick to using it only two or three times a week. It goes on sale on Thursday, Jan. 14.