I set up a MyAir account and have been checking the results every few days. It was nice having the data sent to my phone instead of pulling the SD card and using Sleepyhead.
I was consistently getting scores between 28-68. I was also pulling off the mask on many nights.
Four days ago I went into the clinician menu to check a setting and discovered the machine was set to CPAP with a pressure of 20 instead of AUTOSET and a max pressure of 12 (per my RX). Naturally, I changed the settings and for the past three nights my scores have been 83, 92 and 81 and I haven't pulled of the mask once. I also feel just great in the morning.
Damn that Lincare! Let this be a lesson: check your settings when you get a new machine. I just had a terrible month because of those idiots.