Thank you for contacting CPAP SUPPLYUSA.COM
I would really like to help you with your humidity problem. I do have a question however.
Are you wearing a nasal mask or a full face mask? My first response, is to ask if you could possibly be breathing thru your mouth?
Many people are unaware that they are, but the dry mouth is a good indication and a full face mask would allow you to breathe through your mouth and get the humidity you need. Most people when they hear full face immediately think ,I can't wear one of those, but many people have found they are actually more comfortable with a full face mask.
Dryness is a major problem in wearing CPAP/BIPAP. In fact it is the reason many people give up wearing PAP therapy. You are to be congratulated for sticking with it.
You can use larger volume humidifers with your BIPAP, but I would focus first on the true cause of the excessive dryness. You really should not have to wake up to refill your humidifier
Please let me know if we can be of further help.
Debbie Shirley,RRT