Every year I say I'm not going to cut, but day 55 rolls around I just have to take a peak! They usually don't come out until day 60-61 for me, then I'm back to saying "next year I won't cut until day 60.

True snakes have been hatching for thousands of years, but there has been snakes lost due to not getting out. I have not had this problem because by the time they come out I've got to whole top of the egg cut off.