Quote: I don't know how I missed these, oh yes I do! tons of posting at the same time! LOL
It gets even harder to judge when you only have one messed up questionable egg, when you have more you tend to get a feel and KNOW for sure something is wrong. I don't hesitate to make a view hole if I know my humidity got low or whatever, as long as you don't open below that inner membrane you should be fine with an internal pip. Its when people go opening them up or moving membrane 6 hrs after a pip, that's too soon. Most chicks will get out on their own even when you leave the entire membrane intact! like the article says, I use antibiotic ointment bacitrim (No pain relief though) to keep membrane moist, I switched quite a few hatches ago. No opening the bator every hour to wet the membrane as it stays fairly long and makes it easier for the chick to thrust out when he is ready.
Membranes must be watched, and sometimes even when the membrane looks clear the chick still didn't absorb everything. Its very hard, experience teaches you so much for sure!