Room temps are ok, but could be a few degrees higher ideally.

Your substrate layer is way too thick. Your UTH won't be able to heat through all that. You need to keep your substrate layer ½" thick or less. I would also suggest you switch to eco-earth for better humidity control/mold resistance if you are going to try maternal incubation.

Is there any particular reason why you are going to try maternal incubation? It is really easy to build a cheap incubator that will hold more consistent temps/humidity, and allow the mother to recover far more quickly.

All you need to make an incubator is a small foam cooler, some heat tape, some aluminum foil tape, a thermostat, and some incubation substrate.

To setup the incubator all you have to do is:

1. Tape the heat tape to the inside walls of the cooler using the aluminum foil tape.
2. Hang the thermostat probe in the center of the cooler.
3. Set the thermostat for your desired incubation temp.
4. Place your incubation substrate in the bottom of the cooler (not touching the heat tape)
5. Place the eggs in the substrate