4 of my chick eggs started pipping this morning at 2 am & since then that is as far as they have gotten. Shouldn't they being going faster? They're still chirping and rocking back and forth. At what point should I help them? My humidty stays & around 58% and that's with all my water rings full and 4 sponges soaked. Any ideas on increasing my humidity...think i've tried just bout everything!