Press-n-seal is a newer form of Saran Wrap - easier to use, seals things better, bunches of uses. I never imagined using it to save a chick until it occured to me when a chick wrapped in a towel in a normal incubator was cool to the touch and not doing well.
Evaporation cools. And that poor baby needed to stay warm. So in desperation I made a little sack out of the press n seal and slid egg/and baby in with his little beak out. And it made all the difference, he warmed up cried louder and several very LONG hours later, hatched himself out of egg and sack, fully recovered.
I've lost chicks under papertowels and towels and been wondering and finally decided that it didn't work the way I wanted it to. The plastic holds in moisture and prevents heat loss and it just seems to work better.
The only towel like thing I use now is a damp wool sock, and wool helps prevent heat loss even damp. Had one hatch last night inside a sock, it's kind of cute to find them with their heads poking out in the morning. He'd been kind of stuck in a pullet egg, so I'd given him a zip-assist and put him to "bed" in the damp sock.
First thing this morning there's a little head peeking out the end of the sock blinking at me. He's drying nicely with his two hatch mates.
HELP
