New Ball is not active at night

[MissterDog]

That's the ambient for the hot side. The only reason I have it like that is because it helps keep the cool side from dropping too low. I have a screen top so I struggle with temps. I'm currently using tin foil to help with keep heat and humidity in.

You may want to check how the surface temp is (do you have a temp gun?), because whatever the ambient air temp is on the hot side, the surface may possibly be a few degrees hotter (or colder) just to make sure it's not entering the realm of dangerously hot (95+), since that's where your snake will be making contact.

As for the screen top, you could always try using foam boards in addition to the tin foil.