More stuff:
Provide a humid hide area over a heat pad (use a thermostat). Kings need some humidity at times. Localized is best. Like a plastic shoebox with a hole cut in the lid, filled with damp eco earth or sphagnum moss or whatever.

Screen tops suck.

The best ventilation for kings is side vents or side holes. Tops should be solid. Screen tops work against everything you are suppose to do. Cover those up.