Bertiedog, there is a solution--which I asked JDJ to proactively post on her blog but she didn't. I wanted to help people (when I wrote JDJ about some mis-citations on her blog, that there had never been de novo cataracts from deep dive oxygen--I asked her to cite it correctly--and I gave her the citation--she put it up but first saying they developed after 150 sessions, but it was 48. Then she eventually corrected it after I told her she'd tripled the # of sessions. She never did put up the citations I gave her on oxygen toxicity to the eye and "reversible" myopioa especially with eyes open, and over 2.0 ata. I don't see why not.)
Anyway I also suggested to her in these backchannel communications that she recommend a hydrating bottle for the home oxygen concentrator for those with lung issues, so that the oxygen would not be drying. They use those in clinics and you can buy them for the home concentrator. You put in distilled water (ie sterile) and I recall you fill it 1/3 or 1/2 or something like that. You can call oxyhealth in California and ask their advice if you can't find it on the web. I don't know if it's rx or not. It attaches to the concentrator and then the tubing attaches to it.
She did not include that on her blog either. I actually did deep dive hbot at her clinic in 2003, but then I bought a home chamber, which she was against for many years, but now is positively oriented to. I don't know what to say about normobaric oxygen but it seems to be helping some, but breathing it in without hydration/humidifier for long periods of time could certainly irritate the lungs.
So get the hydrator. It will help! And maybe someone tell JDJ to put this stuff on her blog so that people can have ALL THE INFORMATION THEY NEED to have the BEST health outcome and make the MOST INFORMED CHOICES...