Couple of lessons learned by me:
Plug in the ecoglow at least 30 minutes prior to putting the chicks in the brooder, if possible. I didn't, and had to show the girls where to go (no big deal.)
I have 12 chicks and the Ecoglow20 seemed like it would be way too small, and in my paranoia, I...
We just went through the same thing. The room was about 70 for the first week and then I closed the vent after second week to keep room at 65 or so. Left lights on during day till about 8 at night and a night light for first two weeks. Now they get a "good night ladies" and all lights off at...