I personally would not stress too much about opening the bator, at least until the first egg pips. After you see the first pip, THEN stop turning the later eggs until after the hatch is finished.
I myself often open the hatcher several times during a hatch. HOWEVER, on my hatcher I can remove each plastic window without opening the whole hatcher. Doing this, my humidity never drops more than 2 or 3 percentage points. If you have to take the whole lid off of yours, then try to keep it closed!
I myself often open the hatcher several times during a hatch. HOWEVER, on my hatcher I can remove each plastic window without opening the whole hatcher. Doing this, my humidity never drops more than 2 or 3 percentage points. If you have to take the whole lid off of yours, then try to keep it closed!