Just remember, dry hatching for some still means the humidity in the incubator is at least 30-35%. Those people who "dry" incubate may be living in a place or home that has natural humidity. If you don't have at least 30-35%, the egg will lose too much moisture and will pull in air. The air sack will become too big and the chick has no room to develop. Too much humidity causes the egg to retain too much liquid and too little air space and the chick can drown. It's all real tricky. Getting the right humidity is a personal thing. You can't do what someone else does because they may not have the same environment you do. Even from room to room in your home, the environment changes and you will have to make adjustments. With the Hovabator, I never put water in the "wells" because there was no control that way. I went and got those little plastic baby food containers. They fit just right between the turner and the wall of the incubator. I cut a square in the lid and filled it/them with water. If the humidity was too high, I just took a little piece of tape and taped off part of the hole. I just kept adjusting the tape. The water in the containers last for days. Really easy to adjust to whatever you want that way. In the winter, (same place in the house), I would have to use two containers just to get the humidity right because of the heater in the house making the air so dry. So, you will just need to experiment before you put your eggs in to see what is right for THIS season, THIS room, THIS house, etc. Good luck! Oh yea, there is a section on BYC that is in the learning center that is called hatching 101 or something like that that is very helpful.