I remove mine as they hatch. Once they are active and moving they go to the brooder. Wether to move chicks or not is a personal decision. As long as your humidity is up in a safe zone, there should be no reason not to if you are comfortable moving them. I keep water by my bator so that if my humidity lowers too much I can wet one of my sponges and bring it back up. Chances of shrinkwrapping are low unless you have less than adequate humidity to begin with.
You should be fine. Unless you are in a humid area, I would say that your hygrometer needs to be checked. Unless you are using a small coolerbator set up, 64% does not normally cause condensation. If there are beads of water and not just mist, I would pull the sponge. Condensation is a sign your humidity is more than high enough.
I run 70-80% humidity during lockdown and hatch. I don't like my humidity going below 70% because I do open my bator frequently during hatch time. When you open it it will dip naturally, but I wouldn't worry about lowering it unless you see a lot of condensation in t he bator.
If your humidity is good and you think it needs to be removed, remove it. You might need some warm water though, as it might be stuck on with the membrane. Eleven is great! You could wait until the zipper is out and there'd be no question about the safety of opening the bator.
LOL, that's cute. How long you wait is really a personal thing. I have started to do my eggtopsies w/in 24 of the last hatcher if candling does not reveal any internal pips or movement. I am finding that usually the ones that are going to hatch do so w/in 48 hours of the first hatcher. Then if there are no signs of life after the last has been hatched 24 hours, I call it.
