<<Disclaimer: Verify this information before applying it to your situation.>>
I omitted this from my post on Dry eye treatment.
A humidifier is helpful. I have a small humidifier by
my bed and run it while I sleep.
I prefer the kind that has an evaporative filter (air
passes through the filter - filter soaks up water -
air passing through is humidified).
Dry eye is aggravated by very dry air in the house.
Vicki Jones
Homewood, IL