After a night of cpap the area directly under by nose is very dry and skin is peeling. What causes this and how do you prevent it?

I switch my mask from Swift nasal pillow system to Swift FX nasal pillow system using RES Med S9 machine. It reduced my leakage from 60 lm to 10 lm which is an acceptable leakage, but my mouth has been very dry during the night waking me up to drink water. My humidifier is H5i and (unlike with the o...

What does leakage of .72l/s mean? My Res Med s9 shows leakage of 66l/m, but my old machine shows leakage of .72/s. What is the difference between l/m and l/s? Is l/s a measurement in seconds which translates(when using .72/s) to 4.2l/m meaning no real leakage?

My Res Med S9 shows my AHI at .5, but my leakage is 66 and I always have an unhappy smile for mask fit; should I be concerned about the leakage and unhappy smile when my AHI are so low?