OTHER OPTIONS Raising humidity
Sometimes you can boost the moisture level in your house enough by:
Hanging wet clothes in several rooms.
Boiling stock or water on the stove.
Placing a pan of water in each room, allowing the water to evaporate. Change water daily and wash the pan weekly.
Having indoor houseplants.
Running a hot shower for 10 minutes with the door closed.
Opening the dishwasher after its wash cycle, releasing steam.
Sources: Prevention magazine,Bridging the Gap in Kansas City