Good morning everyone. I have a question for John Bishop...since you have the same machine as me. My balloon has popped! No sleep at all last night until I took off the mask at 4:30 a.m. I was so excited about my good night's sleep the other night...now I am flattened. Last night, within five minutes of wearing the new mask and turning on the machine, I developed a headache again across my forehead and face. The respiratory therapist has told me to "play" with the settings for heat and humidity until I am comfortable. I had the heat at 2 and the humidifier at 3. That didn't help and caused condensation so I raised the heat to 3 per my therapists advice if there is water in my hose or nasal pillows. I still had the headache. I tried to relax and not pay attention to the headache but at 4:30, after not going to sleep at all and being totally frustrated, sleep deprived and depressed...angry also, I just took off the mask and shut down the machine. I was actually afraid to fall asleep. Within 10 minutes of doing this, the headache was gone and I was asleep. Interesting that the first mask which did not fit me right did not give me a headache. I don't know if it is the mask which I love or the humidity. John, do you have preferred settings on your heat and humidity? I am so frustrated. Thank you for your help.