I have a couple ?'s. I am down to the nitty gritty on incubating. Does one stop turning right at Day 18, or at the end of Day 18? Also do you also remove all the vent plugs, so they get oxygen, etc, or leave them in, so humidity stays up? Not sure how that works, if you leave them in, how do the chickies get air, and if you take them out, how do you keep your humidity up? Ugh! I have a Brower Top Hatch by the way... TIA Jill Anyone????