Beardedchick-it sounds like you are on the right track with the pediatric oxygen regulator. After reading the links on your post and the trouble shooting page from the Mississippi State University Extension Service , supplementing oxygen seems like the thing to do.
When we first moved to NM we lived up near Sunspot Observatory at almost 10,000 ft. We didn't have chickens then, though, and we are now down around 4500 ft. like Rebelcowboysnb. I guess I never thought too much about the elevations effect on hatch results. Probably should have!
We have battled the extremely dry air. It is a struggle to keep our humidity up where it should be. One thing that has worked for us is using folded,wet, paper towels. (I change them daily) I set the paper towel in a small bowl or plastic lid varying how many and to what degree we wet them depending on how much we need to raise the humidity.
I've seen it recommended on this site to use a brand new athletic sock, wet and placed in the incubator. I am sure it yields the same results. I worry too much about incubating unwelcome guests in the material-though I am sure they could grow in the paper towels as well.
Do you have eggs in your incubator now? When are they due to hatch? I will be curious to watch and see how much difference the oxygen makes.
When Brad is teaching tonight, so I haven't had a chance to ask his opinion.
Such an interesting topic Beardchick!
Rebelcowboysnb-Do you REALLY have grass growing in the bottom of you bator????
Deb