I love people who are dedicated to researching this condition. It gives me and I'm sure others as well, hope for a better future. I am trying similar things to alleviate dry mouth symptoms.
Things that I'm currently trying are:
1. Raised the bed 6 inches
2. Using oral probiotics - not sure how helpful that is but it is supposed to work similar to gut probiotics.
3. Alkaline Water after waking up (only started yesterday).
Although there isn't much reviewed evidence of Alkaline Water / oral probiotics working, I figured might as well give it a shot, since I do get a lot of acidity during sleep especially and this could be due to stress / anxiety / Depression / etc., which unfortunately nearly all of us here suffer from because of this.
I have used gloves in a box previously for about a year or so. It didn't seem to make it better or worse, just kept it neutral. I have also used humidifier but my lips seemed to absorb the additional moisture and become more swollen which resulted in more trauma to the skin aka more crusting, so I stopped doing that.
Continue with your methods, and I'll continue with mine and lets pray one of us finds a decent headway.