Quote: personally, since I've got a pretty good system... for upping humidity quick, I have the floor lined with paper towels, and use a squeeze bottle (like for ketchup/mustard/etc) with HOT water in it. when I open up, to remove chicks or whatever, then I squirt a bunch of water onto the paper towels. also, I use the paper cartons rather than foam or plastic, so I can also fill one of the empty egg slots with water too, and the egg crate soaks up the water increasing humidity right at the eggs.
usually on day 19 i'll candle everyone quickly, to make sure I didn't miss any obvious quitters (not moving the eggs, just looking in the top) and to see who's internally pipped, moving, and such.
on day 21, usually in the afternoon, i'll take out any that have hatched already, water the floor and let the humidity recover. then do a quick run thru of candling again, and any that haven't at least internally pipped I check for bottom pips. if I have one it gets laid on the side on the paper at the front of the 'bator. I leave a 4" or so gap at the front for chicks to move around and to soak with water when needed. touch up the water if needed and let it set again. if I have any that look like they're starting to dry out too much i'll move them around a central empty slot and fill it. water the floor and i'm out.
when I open it, it's usually only open for a few seconds at a time to pull chicks. maybe 15 seconds to candle or move eggs around, and even less if i'm just adding water.
the trick is using hot water tho. only as hot as the tap will get, not boiling. cooler water pulls the temp down while it's warming up. hotter water evaporates faster as well putting humidity up rapidly.