Hello: I wonder if others have experienced this issue. During winters only, I have some problems breathing at night, as I have to wake up and clear up the inside of my nose by washing it, say after 3-4 hours of sleep, and when waking up my mouth is dry. The current heating system I have is with hot-water radiators. The issue was worse with electrical radiators, at a previous location. I'm using a humidifier and I seem to be at about 50% humidity. Doctors said that's about right and that I should not open the windows, as that reduces the humidity. Went to an ophtalmologist, he told me I should have a surgery for deviated sept, which other ophtalmologists said, when I was younger, shouldn't be a concern. Then, when I went to the surgeon, he told me I should try first a cortison-based spray, Nasonex, and that there's little hope my condition would be alleviated by surgery (BTW, the surgery would not affect the bone, just the inside cartilage). However, this doctor sidestepped pointing the exact cause, saying I should try the spray, then come back to him in 4-5 months. I hate cortison-based products. It seems it has some effect, but ... I'm not aware of having any allergies. Do others suffer from this?