Hey Rhea, have you considered trying substrate-less incubation? I know a lot of snake breeders will use perlite but then will go out and buy plastic egg crate, and put it on top of the wet perlite and rest the eggs on that, so that they are suspended slightly above the substrate. That way, it does not matter how wet the perlite is, because the eggs are not touching it and so they can't actually get wet, they will simply be bathed in nice, humid air. Then on the container put on a tight fitting lid and open it every few days for some fresh air. I found that putting holes in my containers made it too dry, but I have always incubated eggs on moist paper toweling. A layer of paper towels on the bottom, then one on top over the eggs, and only mist the towels enough to keep them damp. Then I put the lid on and every few days I check on them. I had 100% success rate with that method, with snakes. Don't know how well it will work for uros!