This is the time of year your humidifier works over-time! Non-stop usage causes a buildup of harmful bacteria. To keep your family safe from this as well as to prevent dry, itchy skin, deep-clean your humidifier by adding 4 teaspoons of lemon juice per gallon of water and run as usual. Repeat this every 2 weeks. The citric acid in the lemon juice will kills germs and leaves behind a fresh, lemony scent. You should also clean the basin of your unit as per the manufacturer’s instructions.