Gort......
You might try the blue #2080 tape again.....and do a "pressure test" in the morning.
Before removing the tape, take the mask off....hold your nose....relax your jaw.....and, using your diaphragm muscle, pressurize your mouth area to see how much pressure it takes to blow the tape off...and cause the tape to leak.
There are only (3) places pressurized air can leak....either nare...or your mouth. Once you've sealed 'em all....and you're sure you aren't leaking, real progress will be made.
I was 10-years old when I first heard the words "Gort.....klaatu barada nikto".......and I can still see (in my mind) Peter Sellers sitting in his wheelchair....fighting to prevent an involuntary nazi salute.........and Slim Pickins leaving the bombay.....
They don't make 'em like that anymore........