Had to go back to clinic after using my machine for a couple of days as I kept waking up with nose bleeds! I rang the lovely Luke, sleep nurse, and asked if that was normal settling in stuff... er no, apparently not. Anyway went back the following morning and they have given me a humidifier to go with the machine... wow what a difference that makes, no nosebleeds.
So to anyone who is suffering with this please ask your clinic about a humidifier, it made a difference the very first night I had it. Also was not so dry mouthed in the morning either.