Ok, since guestinva resurrected this thread, I thought I'd post an update.
The chapped lips problem continues to wax and wane on a semi-periodic basis. The rare nights where I have a leak that is significant
for me will greatly aggravate the chapping. Fortunately, these nights are actually pretty rare; I get one maybe every couple of weeks or so. The last time I had a non-flat leak line was a about a week or so ago.
A note about what I mean by a "leak that is significant for me": My mask's intentional leak at my pressures is advertised as 20-25 L/min; on the vast majority of nights, my leak line is flat to very flat at somewhere around 17--20 L/min. So a night with a Big Bump in the leak line for me means there's a spot that usually lasts between 5 and 30 minutes in the leak line where the leak goes from that flat baseline to bouncing up around 35--45 L/min. Very, very rarely I'll have two bumps in one night. These Big Bumps in my leak line are NEVER flagged as "Large Leaks" in Encore. And back when I was using the S9, the bumps hardly ever poked above the Red Line. And as I said before, the frequency of these nights with Big Bumps is quite low: I have Big Bump nights at most two or three times a month. And they are often correlated with head cold symptoms or migraine headaches (which cause me to loosen the straps on the Swift FX even more than normal.) So if these leaks are mouth breathing, then I'm not doing enough of it on a regular enough basis to worry about it in my opinion. And I'm simply not going to deal with the further sensory overload of taping my mouth or dealing with a chinstrap on a nightly basis to fix a problem that crops up two or three times a month: the risk of further aggravating the nightly insomnia by increasing the sensory overload just ain't worth it in my humble opinion.
However, the Big Bump nights do strongly correlate to nasty chapped lips: After a Big Bump night, I inevitably wake up with badly chapped lips. No surprise really---pre-CPAP sleeping under a fan in the summer time would cause me to wake up with badly chapped lips too. But once the lips are chapped it takes a long time (and a lot of chapstick and lip balm) to get them to heal. The nightly exposure to the exhaust flow from the FX bouncing of the covers really aggravates them.
I have found:
- Keeping myself well hydrated is critically important. Not enough fluid makes the chapping take much longer to heal.
Various (unflavored) chapsticks and lipbalms do a lot to soothe the lips and it's not too much trouble to sleep with a chapstick in my hand at night.
A hanky over my lips at night does wonders to shield the lips from the fearsome exhaust flow of the Swift FX. If only I could figure out a way to keep the hanky on my lips when I turn over ...
Wind and rain bother the lips a lot during the daytime. No surprise there. And we get a fair amount of wind in Buffalo all winter long. The spring rains are now starting (mixed with snow at times; alternating with snow at other times). So keeping the lips well protected during the day is critical.
Washing the face greatly irritates the lips regardless of which facial cleanser/soap I use. Since my face is dry as well, I've simply stopped washing the face every night. Only wash the face when I take a shower and use a moisturizer afterwards. And though it seems almost unAmerican, I don't take a shower every day either---daily showers dry my skin (and face and lips) too much for comfort.
And I'm still looking for a sweet spot on the humidifier. MD Hosehead---I know about classic mode and tried it briefly; but I'm currently back to using the standard "smart" mode, whatever the heck it is called. My nose actually seems to prefer the humidity level to be on the drier side---whenever I increase the humidity setting from 3 to 4, I get much more congestion. Even at 3 I sometimes find the heat and humidity a bit too much. So many nights I've got the humidity set at 2. Maybe I'll try classic mode again though in the near future.