lol... it's just been irritating me lately since the first thing someone usually says is too high of humidity, but I run low humidity and still get it too sometimes... I think there's more than one reason and egg doesn't lose enough moisture...
I figured it was duck, but had to make sure, lol... I run similar humidity, but still get some like that... usually it's the odd eggs, the ones not as similar sized as the majority...
Do you mist or sponge the eggs? Just curious...
As for surviving the goo, it depends on how much goo you're talking about... a little tends to not be a big deal, in fact when they start spinning for zipping, it twirls back and under their butt into the bottom of the egg... a lot of goo is hit or miss... sometimes you can clear enough away to get them safely out, but the biggest issue is them breathing some in... if it gets into their lungs it dries rock hard and will stop their lungs completely...