If you go to the dry hatch-aholics group on FB they will tell you adding
ANY water it is
NOT a dry hatch. The problem I found with the dry hatch-aholic's recommendations for dry hatch is they don't specify your ambient humidity. (which has an effect on your incubators humidity) and they don't give humidity percentage recommendations. So, you could be in the sweltering jungles of Costa Rica and you don't add water to your incubator and the incubator's humidity is at 60% and you then could take that same incubator to Death Valley and your incubator's humidity would be 0%. Both are technically considered dry hatches to them because no water was added.
But, what I did learn from reading all the dry hatch posts is that it is ok to have the humidity at 20% all through day 18 and not add any water. Once the first checks start hatching the humidity should rise and all is well.
With good recommendations from
@wrathsfarm I kept the humidity at my last hatch between 20-35% range for the most part the first 18 days. Then brought it up to 50% for lockdown and got my best hatch so far. 45 out of 49 set. This next hatch, I am not going to add water the first 18 days and then I am not sure if I want to add water or not at lockdown, I'm still hesitant about going all the way dry.
The other group on facebook that I've been lurking and reading is the stackers group. They stack eggs on top of each other in the incubator to max out the space and then they DONT TURN the eggs at all. This freaks me out a little not having them turned, but they say it works fine.