Well, there is no doubt about it now after last night. I started the night using my Liberty mask since it is the only FF mask I have. After 45 minutes or so as the pressure rose, it blew the mask off my face basically. No matter what I did it wouldn't seal. I was getting "face farts" like crazy and the nasal pillows were leaking so bad it sounded like a boiling teapot.
I took that mask off and did a hasty tape job. The tape I have isn't wide enough so I had to splice two pieces together. I am not sure at what point in the night it happened, but I blew a hole right through the two pieces of tape. I am gonna look for some different tape today. I am exchanging my Liberty for a different FF mask on Monday so until then I might have to try soldering my lips shut if I can't find tape that works.
Snoredog wrote:tape some air streamers to your chin, that way she'll get a visual when you mouth breathe