Disclaimer: I've done a whole 2 hatches ever, both in the last couple weeks.
I will admit to opening the bator to tweak humidity, even in my Minis, because when I filled both wells the humidity shot up to 80+% and I panicked. It probably depends on your bator too, how fast it gets back up to temp, how humidity stabilizes in it. I keep reading that temps are less important during the hatch than humidity, so I've erred on the side of trying to get the humidity where I wanted it. Without disturbing the eggs. I've been hatching at about 60-65% in the Minis, for chicken eggs.
I will admit to opening the bator to tweak humidity, even in my Minis, because when I filled both wells the humidity shot up to 80+% and I panicked. It probably depends on your bator too, how fast it gets back up to temp, how humidity stabilizes in it. I keep reading that temps are less important during the hatch than humidity, so I've erred on the side of trying to get the humidity where I wanted it. Without disturbing the eggs. I've been hatching at about 60-65% in the Minis, for chicken eggs.