First timer with a couple of questions...

[FendersMom]

Hello, I am incubating a barnyard mix of eggs for the first time (bc my 1st grader squally gets to do this as school, but can’t now with schools closed, so we are doing it at home). I am on day 13. I am using a Harris nurtureright 360 incubator. I have 12 eggs. One was infertile. At day 8, when I first candled, it seemed the other 11 were developing. The next candling, yesterday at day 12, it seemed that 3 of them looked more like they had at day 8. I can’t detect movement and they don’t seem to be filling the egg as much as the ones that I can tell are alive and well. I think they have stopped, but I’m not sure.

does this look like a goner? Should I leave them to see if anything happens? Could this have happened bc I didn’t clean the eggs and bacteria got in? The person who sold me the eggs said not to clean then

Secondly, I worry about my humidity. My incubator said 48-55%. I since read anywhere from 30-50%, with a lot of conflicting info. I’ve mostly been running in the high 40s.I’m worried bc my air cells seem smaller than the reference image. What humidity should I try to run on to get them to the appropriate size? I really want this to be successful since my kids are so excited. I would appreciate any advice.

 

[Poultrykeeper12]

In the first one that one seems to be a goner. However your humidity is fine. I'm incubating eggs at the moment also and i'm following the same humidity numbers as you are. Happy Hatching and good luck.

Also the embryo needs the air at the end of the incubation period, Once it runs out it will pip.

The eggs you candled before (In the first pic) They were most likely Unfertile eggs, so no its not your fault. Make sure you wash your hands before messing with them though.

The second one looks great!

 

[LikeTurkeys]

Given the size and the fact that I can't see any veins, I think that one may be a goner. You're not supposed to clean eggs for hatching because it washes off the 'bloom'; a natural antibacterial coating on the egg. So no, I don't think it was your fault at all.

48-55% is kind of high, you may want to lower that down to 35. That'll allow the eggs to lose the proper amount of moisture.

 

[UThobbyfarmer]

Your instinct was correct. First egg pictured is a quitter. Anytime they go from clear veins to a murky/cloudy look they've quit. No idea why. There's a lot of reasons why eggs quit. I'll come back and edit in some link for troubleshooting of that interests you.

Aircell looks a little small but not terribly so. Considering dropping the humidity down to 35-40 till lockdown. That will help them along a bit without doing anything too drastic.


Edit: These are both good resource for troubleshooting your hatch.

http://extension.msstate.edu/content/trouble-shooting-failures-egg-incubation

https://web.extension.illinois.edu/eggs/res24-00.html

 

[BirdsBeesTrees]

I did an experiment; I washed half of my eggs with a 50/50 solution of peroxide and water, and then I marked them. I left the other half of mostly clean eggs unwashed. I had the exact same of washed and unwashed hatch.
There is so much misinformation out there it is maddening. If something doesn't sound right try it out for yourself and see.
I'm not putting dirty eggs into my incubators, it's discusting.
I've been doing awesome incubating at 30-35% You'll have to see what works for you.