Hi..I wondered if anyone had this cracking of the roof of their mouth. He has a great prescribed mouthwash that he uses. We looked into the humdiifier thing and if the room was 50 or over the specialist told us we did not need one. I bought a humidifier and also a hygro...(for the spelling) to help with his mouth problems. We will see the doctor on Tuesday. There was no pain and the problem seems to have corrected itself. I may go to the drugstore tomorrow to see if there is anything else they have for dry mouth. It has been a problem where he wakes up and his tongue is sticking to the side of his mouth. I cant even imagine what that would be like. I am still having a problem thinking about the mask. WOW..Just wondering about this.