if none have pipped you can open the bator and tap a few eggs with your finger while they are next to your ear and listen for chirping.OMG, this is my first hatch and I thought I'd been SO careful... It turns out I actually did lock down on day 17, by mistake, thinking it was day 18. The poor things were not turned that day. I also reduced the temp to 37C from 37.5, and of course whacked up humidity too early. No wonder nothing is happening today, as it's really day 20, not 21.i hope I haven't killed/ hurt them.