My beardie is laying eggs in a large plastic bin (measurments unknow) and filled half way to the top with just topsoil. she has been diggin al the way to the bottom of the bin and laying there, this is her 3rd clucth and first 2 the same. When i get to the eggs there smashed or collapsed, then i get them to the incubator ASAP (87 degress C and 90%hum) then the good solid eggs collase and dry up.
from what you say you need more humidity. If they are perfectly fine and start to collapse then yes you need more humidity in the incubator and if you catch them in time you can bring them back.
don't try and measure your humidity, just look at your eggs and they will tell you if you need more humidity or less humidity. Like i said if they are collapsing you need more and if there is to much they will sweat and there will be water on the eggs. But if you don't fix the to much humidity then the eggs will drown and die, you just need to find the perfect humidity.