Yeah, at first I was skeptical, but it's hard to argue with results. I wouldn't have done it with purchased eggs... I tried test hatches on my own eggs. I started because I'd read so much about it, then missed a lockdown date on some eggs and came home to find chicks trying to maneuver over the turner. I'd been having to assist almost all my hatches and I it occurred to me that eggs don't hatch in that unnaturally high humidity in the nest, but here these chicks were, not a drop of humidity, and I hadn't had to peel a bit of stuck membrane off them. My theory now is that the external humidity contributes to shrinkwrapping if conditions in the bator aren't kept just right.
As for using two bators, since I only hatch certain eggs (legbar, brahma or super jumbo), which I don't get lots of yet, I toss them in the brinsea when I find a good candidate. I keep the rubber shelf liner in the foam bator, so I can pull it out, wazine the bator, put a fresh liner in while I wash and disinfect the previous lining, and it's good to go without losing much of its temp. I give the bottom a good scrubbing when there's a lull in hatching and I know it won't be needed for a few days. Without all the humidity and damp, there's actually less bacteria... my hatched chicks even seem healthier, because I haven't had to add one to the ziplock baggie in the freezer in several months... I hate those baggies. Also, the brinsea has a fan, which contributes to shrinkwrapping during lockdown, so I move the eggs into the fanless bator. And a bonus is that you don't have to worry about a newly hatched whirling dervish cracking an egg that wasn't ready for hatch.
I'm afraid I know the answer but baggies? And then? I'm going to try your totally dry hatch on a few of my own eggs. It makes sense here where we have some natural humidity.
@SharkmanDan Good luck with the eye surgery! Yikes!