Not at all picking on you, but it is really important to know what the actual humidity and temperature is inside your bator... It won’t help now, but, if you want to do this again, it’s worth finding a good way to monitor.
Lots of people here like to use the govee hygrometer and a separate mercury thermometer (the thermometer for the incubator only costs a few $ at most feed stores)
https://www.amazon.com/Govee-Thermometer-Hygrometer-Bluetooth-Temperature/dp/B07R586J37/ref=mp_s_a_1_3?crid=1XX384L74OLYR&dib=eyJ2IjoiMSJ9.Sy-zWxhd8VxwdP6G5Pdw01kERgm-JYJPpv8OOM3Q7E73xFQMv7MbZdflEVEhTdCvFlxfxhU6AExYW9bLOPJuu8_NlqbwujrOT54upaCeZd6ZbKcneWsClGKC1k_TPHaLEcxB4uJIxNmLzqTTzHyb1eANfc8ncwm7OuOuahJ4MRLtK_jjWHJOKAFtmRNvJQ0O5p8NReg1hprmsDtE8uYuZA._qp2rIWMf8no6dfE0SI_R40uwdjoHrQT89P6uLSTV3k&dib_tag=se&keywords=govee+humidity+sensor&qid=1733290134&sprefix=govee+hum,aps,277&sr=8-3
I personally use this one
https://www.amazon.com/SECRUI-Therm...BQ1RZGG&psc=1&ref_=pd_bap_m_grid_dv_rp_0_14_t
I do salt test them, which isn’t hard- I can send you info on “how to”.
But. Let’s focus on the moment-
Ducklings can often take 48+ hours to zip. Once you have intervened, personally, I get more “hands on”.
Especially if you are not certain about your incubator “settings”.
Personally, at this point, I would grab some coconut oil, put a bit in a small bowl, grab some qtips (vaseline is a second choice, olive oil if that’s all you have). Carefully peel open the area of the egg where the air cell is - being very careful to watch for (and stop if you see) any red veins or bleeding.
Use the qtips to apply the “oil” to any inner membrane that you expose. Also use the “oily” qtip to “roll” any (non veinious) membrane away from the baby.
If you choose to assist...
It’s important to open the shell but allow the baby to push itself out. If the yolk sack is not absorbed, you are going to have another challenge on your hands.
And, the strength that they gain from the process of working their way out of the shell is also important.
There is a great article here, I’ll see if I can find it. I’ll also look for some pics of how much of the egg I open when I assist...