They shrink wrapped in the 60's? What was your day 1-18 humidity? Shrink wrap can happen at any point during incubation with too low humidity and especially to chicks with pipped shells for long periods and with frequent opening of the incubator during lockdown. I did this with my last hatch of buffs, I tried dry days 1-18 and let the humidity drop and stay in the 20's with five chicks out of 12 hatching, one died another had crooked beak and another had bent toes, I have 3 survivors. There lockdown humidity reached 75 at times, they were still shrink wrapped. Sorry Renee good luck on your next hatch.