Best humidifier deals as of Jan. 12: BEST FOR THE NIGHTSTAND: Levoit Dual 100 humidifier — save $15.35 BEST FOR WARM AND COOL MIST: TaoTronics warm and cool mist humidifier — save $17 BEST BANG FOR YOUR BUCK: Homasy Humidifier — save $10 Once the holidays pass, winter is just a time when you’re cold…