Whether my terminology or even my observations are correct, here is what I observed in my Easter hatch and eggtopsies.
The forced air ran dry twice during the first 18 days. Many eggs from it [hatched in the still air] that failed to pip had a dead chick in the unpiped membrane and occupied only the bottom 1/2 of the egg; I say shrink wrapped. Some pipped pretty low and stopped; also shrink wrapped, in my terminology.
Humidity spiked high in the still air hatcher soon after the first few chicks were out or zipping, and starting with that spike, zippers either quit early or took awhile and came out "gooie" with pieces of membrane still on them; I say sticky, and caused by too high humidity during hatch.
Some appeared to have a combination of shrink wrap and sticky, probably from being first too dry, then too wet; shrink wrapped and sticky to me.