You need to spray down the egg with warm water. With your setup I’m surprised even two made it this far, congrats 😂! Tell your brother not to open the bator anymore unless it’s to spray the eggs once. If you can get a humidity gauge in there, that would be best. Normally this would be a little...
That sounds normal, they take a long time to hatch and rest a lot. Try tapping on the bator to see if they make noise. Can you see the inner membrane? What color is it? What has been the normal temp and humidity? What number day is it?