Where does the EC skin start for you most of the time? At that part where the lips meet? Does it not start slightly inside the mouth?
For me, I get crusting on the inner lip area all the time. If I use aquaphor on the outer dry lips (the vermilion), it causes the crusts to fall off the outer part of the lip (the vermilion) and makes the skin there raw. But the crust remains on the inner lip area. If I use the saliva gel on the inner lip area, it stops the crusting there.