So putting an oil next to the intake to help us sleep would be a good idea, if the person can handle the smell. Brain starts realizing smell equals sleep. After a while, the oil could slowly be decreased until the brain stops associating the oil to the sleep and connects it to the CPAP or mask instead. This is the basis to sleep hygiene anyway, minus the oil.
Back in college (when my insomnia was at its worse), I had myself trained for a long time to fall asleep to a certain Kitaro album. Worked great until that cassette broke. Then I could not fall asleep at all for almost three, four days. I was napping, about a half hour or so at a time, but no real sleep. Luckily I finally crashed but learned an important lesson to keep as many of my "triggers" internal as I could.
As for the dog, I had a Rottweiler with a gas issue. No filter in the world could keep that out.
Apnea Board Moderator
Breathe deeply and count to zen.