i've heard not to open the bator on the last three days before hatch (18th day) and i had a chick hatched early on the 20th day and the others haven't hatched and I just want to know for how long can he stay in there with 100.0 degrees? I increased the humidity on the 18th day and I just wanted to know if the temp. always has to stay on 99-101 degrees or do you have to lower it on the 18th day? or just leave it like that 99-101 degrees for the whole 21 days or until they hatch?