Only thing to watch out for his lung irratation with high humidy. I have asthma and was having a lot of problems after about a month on the cpap. Doc had me try turning the heater down to 1 (from 3), and I've been breathing a lot better over the last 3 months - even now, in the middle of north florida pollen season.
When I first started I needed the heater on 3 for my sinuses, but for whatever reason, I seem fine now at 1. I use a saline spray (Ocean) each night before I go to sleep and as soon as I wake up. I also put a thin coat of Ayr nasal gel on my nasal pillows each night. Maybe my nose just got used to it...
Gotta just keep trying things and remember that what works for one person may or may not work for you.
Oh...one thing I've really liked over the last couple of months are my hose covers. I got them from a very nice lady on ebay (I'm sure you can seek her out) who sews these really super soft insulating covers for the hose. In particular, the short piece that connects the mask to the main hose - not very expensive at all.
I run my hose up over my head and hang it from a string - it would clatter against the wall when I moved, plus it was rough where it sometimes touched the side of my head.
Now its like a soft (and quiet) pillowy tube
One of the simplest and best investments I've made.