I just thought I'd add that I have the Fisher & Paykel hc100 heated humidifier and I don't think it's that good. What might be better?

My mouth is not usually dry at all. I might discuss these things with my respiratory therapist. Thanks for the information.

Is that different than just the temperature?

I'm pretty sure it's working right. It goes through quite a bit of water when I use it. I'm not sure of the brand and how would I know if it's working right?

I use a Mirage Swift Nasal Pillows mask most of the time and the nasal membranes get very dry and the dried mucus (and sometimes blood when it gets really bad) has to almost be chiseled loose. I do saline spray and Ayr gel (though I could probably do it more often) and I try to use another nasal mas...