1-I quit the Xylar, because it was not doing any good. The Xylar is working very good with my wife.
2-The "professional" chin strap didn't work for me, either.
What really work for me is:
A-Avoid for any means to sleep on my back. (that is not easy).
B-Get the right amount of water in the air that I am breathing.
We got yesterday a very bad storm and the humidity in the bedroom with A/c was about 60% . With the setting that I got in the machine (6) at 2:00 am I got condensation in the hose and awake me, because the machine began to bap, bap, bap every time I inspired. It took me about 20 minutes to find it out, lowered the setting and resume sleeping. Too much humidity gave me asthma and needed to use the Albuterol that I haven't used I more than 3 months. (Since the beginning of the therapy).
I must learn what will be the winter settings, because in my bedroom in winter time the relative humidity (with out humidifier) is around 20-25 % and the bedroom is cooler than now. I must avoid condensation in the hose and find out the exact correlation of wet -heater in the hose to avoid condensation and asthma.This will beginning to happens in 1-2 months from now. I got a Vick humidifier that I use in winter time. It raises up the RH to 40-45% after 4 hours running.
Remember that I am still learning to cope with this system.
At the end, I am happy with the machine, with my FFM mask, and with the forum, because I am leaving better.