A humidifier is a household appliance that increases the moisture in a room and releases a cool mist of air. Some humidifiers release medicine or antibiotic vapors to open airwaves or decrease coughs. However, some models can overheat the water sitting in them, causing a noticeable smell.
It's a common problem to have bad odors leaking from a humidifier because the stagnant water inside the tank is a great environment for mold to grow. Add 4 teaspoons lemon juice to the water in your humidifier to eliminate the stink.
Adapted from "Lemon Juice: Lighten Your Hair and Solve Household Problems," © 2009 Publications International, Ltd.