6 days left for muscovy eggs to hutch and emergency incubator. Help

[KranK]

Hello.
It's my first time hatching ducks. We didn't know back then that muscovies take longer to hatch and we placed them under a broody hen together with indian runner ducks eggs. 2 runners hatched 2 days ago and mom hen started leaving the nest today very often. Yesterday i was prepared for this so i quickly made a diy incubator according to some videos and tutorials. I don't have anyone to borrow a broody hen or incubator from. It consists of a plastic box with a cloth on the bottom so eggs stay in place, a water cup for humidity and a 40W glass bulb. I'm regulating the temperature by opening or closing the lid because it doesn't drop or rise very quickly. I'm planning to change eggs places everytime i turn them so that every egg gets same amount of heat. Heres a photo of it:
Do anyone have any advice about it? Sadly i don't have temperature controler or electric thermometer btw. And if my calculations are good then there are about 6 days until eggs hatch.

 

[nuthatched]

Do you have a thermometer of any sort?

 

[KranK]

Do you have a thermometer of any sort?

Yes tou can see it on the photo a bit. It's normal air thermometer that we used in house but it seems that it's working good. It's pretty sensitive to temperature

 

[nuthatched]

Yes tou can see it on the photo a bit. It's normal air thermometer that we used in house but it seems that it's working good. It's pretty sensitive to temperature

Oh, I didn't see it there.
Have you candled the eggs?

 

[KranK]

Oh, I didn't see it there.
Have you candled the eggs?

Yes. They ale look like this: I hope you know what i meant. I can't post a photo cuz my only phone is used for candling and i got no other camera.

 

[KranK]

I know i won't get 100% hatching ratio but i want to give even a smallest chance that even one duckling would hatch.

 

[nuthatched]

Yes. They ale look like this: I hope you know what i meant. I can't post a photo cuz my only phone is used for candling and i got no other camera.View attachment 3094770

That's ok. Do you have a flashlight? If you can see veins, everything is fine. :]

 

[KranK]

That's ok. Do you have a flashlight? If you can see veins, everything is fine. :]

My flashlight is too weak. I'll try to make a photo when mom comes back and i'll make photo with her phone. Actually the black part on the picture, on mine eggs is mostly so dark that i can't see anything except darkness. But i had an unfertilized egg and it was completely different, whole thing had a white to red gradiend kinda.

 

[KranK]

That's ok. Do you have a flashlight? If you can see veins, everything is fine. :]

Will it do any harm if the temperature drops or raises 1 Celcius degree sometimes? I try to prevent that but you know, it's out of my control sometimes

 

[KranK]

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