Its day 18 (count down says 3 days before hatch day), the Brinsea Mini Advanced shuts off when the counter hits 2 days. I had to go into lockdown about 1:30 PM today because one of the eggs was chirping. I have filled the reservoirs to the brim. My concern is decreased water levels before Wednesday. If the humidity goes too low before all the eggs hatch, is it ok to lift the edge just far enough open to slide in natural wet sponges to get the humidity back up to 65%+???