This is quite a science! Sounds like you have studied it well, and have learned by trial and error. I gather you're in West Virginia. I did a comparison in temperature and rainfall in winter. I see your temperatures are on average just a bit lower than ours in BC, and your precipitation comes more in the form of snow, while we have a lot of rain. I have never noticed any condensation in the coops. We do get quite cold spells here very occasionally and cold northeast winds. When that happens I have in the past put some plastic/insulation over the door which has cracks in it, in the larger coop (not this small coop I've been talking about). But I haven't done that this year. We've had an awful lot of rain.
In the larger coop, I have been using a manure box under the roosting area, and I don't clean that out very often. I have a wire rack over it, and I scrape the worst of the manure off and throw that outside on the manure/compost pile. Some of the manure does end up in the box with shavings but that pile doesn't get smelly. So now I'm thinking I can try this DLM there as well - not in the whole coop but in that box. I'll remove the wire rack and encourage composting conditions. Those hens in that larger coop tend to do most of their business over that area at night, or outside in the run during the day - not much in the rest of the coop. They're much neater than the hens and rooster in the small coop. So I can contain the DL in that box under the roost.
I'll start the DLM in both coops and see how it goes.
Thanks, Beekissed and Daisy8s! I'll be back if I have more questions, and will try to remember to give an update at some point.