The other day I was talking with the respiratory therapist at my DME and he mentioned that he had started using the Pilairo himself. In an earlier conversation I had mentioned the nose lesions caused by the Pilairo, and the conversation the other day he confirmed that he experiences the same effect.
Thinking about this for a while I decided to try Lansinoh cream, recommended by others here for similar problems with other masks. I am happy to report that I have been using it now for three weeks and have had no further nose lesions from the Pilairo.
All it takes is a tiny little dab smeared inside each nostril before going to bed. It is odorless and I can't even tell it is there. But apparently it is enough to stop whatever friction was causing the lesions.
Now if I could just find a reliable way to keep it from starting to whistle in the middle of the night, I will have the perfect mask for me.