Gentle rubbing and manipulation of the crunchy stuff got the sticky chick looking a little more normal. I don't know that it'll ever be chick fluffy, but at least it's not looking so, well, bedraggled. I moved Hatch No. 2's chicks into the big brooder with Hatch No. 1, but kept behind the littlest one to keep sticky chick company while it gets a bit more with the program.
Normally I que sera sera the hatches, but this little one had half-zipped when it couldn't move anymore. I gave it half a day and then decided to intervene when I saw the chick was still moving and none of the other eggs had pips. Poor thing was really weak from all the efforts and had wings glued to the head and just frozen in place it was so sticky, so after moistening and freeing up, I just left it solo in an incubator for a bit. Still a little wobbly on the feet, but it's moving about upright and being sociable with the runt chick.