You should be able to find Betadine or Iodine at WalMart, CVS, etc.Hi. Do you know what you wrote about that can dry it out?
Can you post some updated photos of the birds?
Are the scabs getting worse?
Do you see lesions inside the beaks?
https://the-chicken-chick.com/fowl-pox-prevention-treatmen/
It looks like the dry form of fowl pox. It affects young chicks much more seriously. Watch for scabs covering nostrils or blocking eyes where they may have trouble breathing or cannot see food or water.Do not disturb scabs unless they ate covering nostrils. Betadine could be applied to scabs to help dry them.
Could you go back and try to delete some of the multiple copies of pictures? That would make your thread easier to read by more. At the bottom of the post with pictures, just go back and hit the edit icon.
I would put some plain Neosporin twice a day on the eyes of the ones with eye scabs, since those can become infected with a secondary bacterial infection.