Hi again, GTaylor, and thanks for your comment. Generally speaking, I rarely have issues wearing any kind of mask (surgical, N-95, or even cloth). Often, in my profession (respiratory therapist), I have to keep a mask on throughout most of the day in the hospital.
There are occasions, however, when the mask does seem to provide a bit of a challenge keeping it on. The heat, the close confines and even the small space behind the mask which you described. What I find works for me in these situations is, following an inhalation, I exhale through pursed lips and direct the exhaled breath downwards. That way, my next breath (in) is not affected by the exhaled breath which I just expelled.
Do you think this might work for you?
All the best,
Leon (site moderator COPD.net)