do you remember when they starting getting that way?
I'm not sure of our time difference, but it's just Wednesday morning here. If you set on Monday afternoon, the third day overdue would
start Thursday afternoon.
And, with as high as your humidity had been, i doubt true shrinkwrapping will be a problem. And with the temps on the low side, it's even less likely.
But.. if the air cell has drawn down, it's a toss up now, so I'd say at this point, you have to trust your gut feeling. Go in whenever you feel the time has come.
Did you ever take any pics of the air cell or trace your air cell lines? I'm curious as to how big they were.
for what its worth, I have a single egg in my incubator that was under a hen. Her chicks hatched last week, this one was alive but was a very late contribution to the nest. I have no idea what "day" it is on, or how much they sat on it, so I'm going by looks and watching the air cell.