We are on day 21 tonight, heard chirping last night before bed almost 24 hours ago. My son opened the incubator for a moment and i quickly closed it. Humidity only dropped to maybe 60% but went back up fairly quick. I was hoping to see a hatched chick this morning but nothing. I have not heard anymore chirping at all. From the windows it does not appear any have pipped through their shell. Any suggestions? This is killing me as they were set to hatch close to Christmas for my kids and if none of 30 hatch they will be devastated Thanks for any thoughts or ideas. Bella.