when was groundhogs day, nevermind i looked at the hatching thread....ummm you should never crack any eggs open until at least 5 days after their due date. with you opening the incubator and not candling before you cracked the eggs and not waiting till at least 5 days after due date plus the humidity drop durring lockdown, i'm sorry but chances are slim that the others wont hatch as well but you should still give them at least 5 days after today before cracking them open.
 
being your first time:
 
what was your humidity at during days 1-18?
what has your temp been throughout incubation?
what was your humidity during lockdown?
 
i will try and give you some advice a bit later as i am on my 3rd hatch. my 1st hatch out of 9 developed chicks ony 2 hatched. the chicks were way to wet and drowned, now these were shipped eggs. out of the developed ones from my hens all 4 hatched so i had a total of 6 chicks my 1st ever hatch. my 2nd hatch i had all 5 of my fertile eggs hatch. 3rd hatch i'm hoping for at least 9 out of 11 as my incubator got turned off and 2 look like they didnt make through that temp drop ( got down to 88)