Hi @joss,
I have advanced copd to and also sleep apnea. I was having issues with it sore throats, aerophagia and because I require quite a high pressure setting I found I had to have the head set very tight which made a real mess of my face (all day tram lines etc etc) but earlier this year I was issued with a humidifier for it (devilbiss) completely changed my life if you haven’t tried it might be worth a squint at
Existence is a state of mind, my minds a right state