Hey first post here. Ive got four little adorable duck eggs and this is my first time ever incubating anything. Got a Hovabator 1602N off craigslist with a "incubator warehouse" fan affixed to it and said mallard eggs. Two were kept stored for a week so it started late or early? They said they hatched their chickens with it too so it must be working. I bleached the essential parts. and put the eggs in a clean shallow tupperware under the fan regardless. Plus keeps them from rolling around. I started with five and one was an obviously early no go. Looks like it wasnt fertile. The other four were great up to about two weeks in. I turn them gently 3 to 5 times per day with the air cell slightly facing upwards and do a quick candling during turns every few days. RH 65% temp 98-100F to my best efforts. Egg 1,2,&3 are VERY active and kickin'. 
Theyve been laid around March 20th and I officially started incubation on March 23rd.
TLDR Im starting to get attached to the little guys and wondering if #4 is alive or not. I have a suspicion its not. No movement visible since yesterday. Theres no bad smell. Im aware it got some dirt on it but dont want to risk rinsing it off. Dead? Quitter?Growing ahead of everybody? Its too dark to see on the other end.
Same egg in all pics:
Theyve been laid around March 20th and I officially started incubation on March 23rd. TLDR Im starting to get attached to the little guys and wondering if #4 is alive or not. I have a suspicion its not. No movement visible since yesterday. Theres no bad smell. Im aware it got some dirt on it but dont want to risk rinsing it off. Dead? Quitter?Growing ahead of everybody? Its too dark to see on the other end.
Same egg in all pics:
