Nightmares disturb you during the night, throat is tickling and you feel stuffiness in your nose? This is not a commercial for cold remedy. Most likely it’s a sign for air being dry and needed to be humidified. Of course, you may trust your grandmother’s advice and place wet towels or even put water in bowls around. But in our high technologic century there are some more effective methods, at least manufacturers of the air humidifiers announce it.