"Your skin cracks and bleeds, your lips shrivel to prunes and your nose feels stuffy and inflamed. Not only is dry winter air uncomfortable, but experts say those skin changesweaken your body’s defensesagainst sickness-causing germs. It’s no wonder Americans buyroughly 10 million humidifierseach year.
But depending on how frequently you clean your machine—and the type of water you fill it with—you may be inhaling harmful microorganisms."
"The simple answer is yes, but the reasons may not be what you expect. Odors do affect peoples mood, work performance and behavior in a variety of ways but it isnt because odors work on us like a drug, instead we work on them through our experiences with them." - Scientific American