Thanks for your feedback, I can make a new thread perhaps. Yes the pressure seems to do that around 4 times every night and also seems close to the leak spikes. Maybe my mouth is opening up and the cpap is trying to compensate for the leak? I haven't been sleeping that deeply so perhaps it's waking ...

And here is a slightly worse night:

http://i.imgur.com/E82qaw4.jpg

Sleepy Brit -- What do your leaks look in SleepyHead with the nasal mask? Just checking because if you're having very large leaks (even mouth leaks) the AHI could be wrong. Not saying it's happening, just checking. . Thanks for checking! I appreciate it. Here is a leak graph from last night. I'd be...

So great to read about your experiences. Thanks for taking the time to share them. I fear I probably have the same physical root causes that you have, with perhaps an added dose of constant nasal congestion and narrow nostrils to force me to favour mouth breathing since I was a small child. I'm a co...