Confused about some eggs

[FastDad]

do someone know, why some eggs get transparent "windos"?
and why some eggs "sweating"?

[muddoc]

The windows are usually due to a lack of calcium in that spot. There is nothing you can do about it, as the female is the one that does that. I have rarely had a problem with a window. I do however put liquid band-aid over most of my windows and never had a problem.

As for sweating eggs, extra care should be taken to dry the spot off as often as you can. I normally have poor luck saving an egg that is sweating early in incubation. In my opinion, typically a sweating egg is due to a dead embryo. When the egg starts decomposing, it generates heat and begins to sweat.

Those are my observations, and I hope they help,

[FastDad]

Thanks!
but
I´ve got the feeling that these windows are growing

[LadyOhh]

Windows do grow.

It may be because of several reasons, but my first inclination is to check your humidity and make sure that egg is not overly wet.

[Toronto Python Gurus]

it does sound like a humidity problem

[FastDad]

I use a Perlite and Vermiculite mix (about 50/50)
and use 30% weight-ratio of water.
It feels verry dry and there is also no condansation in the boxes.