Just behind you; on day 23 of 26 for one abandoned mallard egg in a homemade 11 by 17" styrofoam incubator. I candled egg last night and there is still some movement & increased air cell but I don't see internal pip. I assume should go into lockdown tomorrow anyway. Duckling seems small & is near air cell with yolk & albumin at small end (duckling is ~ same size as those liquids). Have kept air cell end slightly raised. Temp has been ~100 & humidity (via washcloth in plastic jug with sprinkler holes at top) 50 to 60% usually 55 but last week keeping closer to 45 to 50 since air cell seemed too small. I'm reading lockdown temp should drop to 98 and humidity up to 65%, 75%, 85%, (or close to 100% which sounds wrong). I have 2 small vent holes diameter just larger than pencil and assume should add 2 more tonight. Looking for advice on lockdown temp, humidity, air vents and flooring - should egg be directly on styrofoam, be on soft mesh shelf liner or does that prevent rolling, or should it be on dry washcloth (it has been in cotton & feathers). I added to this forum since info could help both of us.