I did a mask fit test, and adjusted it to not leak while lying down.
(while lying flat on my back, and perfectly still, which I later found out is not a real world scenario...)
I had read somewhere about making it looser than you think you need it to be. I think the elastic bands must have broken in some after the first hour or so, and loosened up even more. Plus I realized when your head rolls over a little, the whole mask/harness shifts pressure on the seal, and opens up leaks.
Woke up pretty much every hour:
Oh is it morning yet - no it's 12-something.
What's all the air noise - wow it's just 1-something.
Why is my heart pounding - ah just 2-something in the morning.
How is it blowing on my eyes and my neck both at the same time?
Around 4am I realized I was going to have to tighten it up. Not wanting to wake up my wife with all the Velcro on and off sounds, I took the mask with me to the bathroom and torqued it down some more. No more leaks, even when moving my head to the side. Feels a little too tight though. Not sure if there is going to be a happy medium, or just leave it as is.
Turned off the ramp this morning (for tonight). It started at 4 (machine is set for 6-12) with a 20 minute ramp. Every time I paused the machine (go to the bathroom, check/reset the seal, etc.) it started the ramp again. Then I ended up laying there for 20 minutes waiting for it to get up to 6. Figured I might as well just start right at 6 from now on.
It's weird how you can realize there's air coming from somewhere (noisy) but not be able to figure out where it's getting out. Pressing different points on the mask, feeling all around it for air coming out, but still not pinning it down.
At one point it felt like the seal had flopped outwards, sort of inverted from how it's supposed to be. With the machine cranking up the volume of air to compensate, I couldn't just push the seal back in because it would blow back out again, I had to take the mask off completely and start over.
Haven't run the data through Sleepyhead yet, plus with all the leaks it probably doesn't mean a lot for this first night anyway. Here's the summary data from the machine display for now:
Total AI 11.6
Central AI 11.0
Humidifier set to auto, climateline tubing. After I got it to quit leaking I definitely wasn't feeling dry anymore, but before that I got dry mouth at least a couple of times.
One weird thing, sometimes when my mouth would open, my cheeks would balloon out, chipmunk style. I had to make a conscious effort (which kind of interferes with sleeping...) to get my mouth closed, and then to get my cheeks to squeeze back in again, making that extra air go somewhere. That kept changing how the mask was sealing too, with my cheeks swelling up and going back down.
Even with waking up multiple times, I still feel the same this morning, or maybe a little better, than without the CPAP at all.