75-95% grown embryos didn't hutch out. Why?

[jacril2607]

Hi All,
New to incubation. Table top incubator, auto turn+ fan.
Temp at 37.5 Degree C. Humidity 70%+.
Placed 15 quail egg n 6 cockatiel eggs.
Lock down at 19th day.
1st Q hutched out on day 21st, and 2nd and 3ed Q on 22nd day. Healthy babies.
Then nothing happened..!!
When removed the eggs, find all of the eggs had babies of 75-99% growth and NONE of them were dried out, but just didn't hutched out!!
I placed a wet kitchen tissue(instead wet sponge) and find it drying out in 2 days..!!, even though the humidity showing 70+%.
Can anyone find anything wrong I am doing or points I missed.

This is the pic of last day.
Please advise.
Thanks in advance.

 

[jacril2607]

Hi All..
Haven't got any replay at all. Please give me some ideas..
Thanks.

 

[subhanalah]

Your humidity is 70+ during the whole incubation?

 

[jacril2607]

Hi,Thx for the replay.
Humidity was 55% until I lock it down, then added more water to bring it up. Is that the right way to do it?

 

[subhanalah]

Okay, what likely happened is that they were unable to lose enough weight throughout incubation, so grew too big to hatch. Next time try 25-45% humidity before you go into lock down at which point you want it around 65-75%

 

[blucoondawg]

I have good hatches with 20 to 40% humidity I know some people say to go higher but I disagree

 

[jacril2607]

Hi subhanalah,
That seems Quite right, Couple of them were really big babies stuck in egg. Thanks. I will take it on board.
As there is no mist to see, is that ok to spray a bit water the day or just before it hutch.
Regards

 

[jacril2607]

Hi blucoondawg,
see the pic I take today. Out side temp and humidity (inside an old tv cabinet).
Inside it may be higher. How do I control humidity lesser than outside, can I run it dry(without water).

 

[subhanalah]

Yes, you can run it dry, without water, especially if your ambient humidity is so high. If you can't get the humidity below 45, you may even need a dehumidifier for the first 18 days of the incubation.

 

[jacril2607]

Gr8 subhanalah, I usually use a dehumidifier in kids rooms! But didn't catch the point. I will drain it down n see the humidity 2morrow. Thx man.