You need to maintain a air temp of 80-84 throughout the cage. and a spot on one side thats 90-94 for thermo-regulation and digestion.

If you using a screen lid on a tank, best way to keep humidity up is cover 3/4 of the screen with alum foil and tape it down. and mist with water if needed.

Also you need to buy yourself a nice digital thermometer to measure your temps. the stick on ones are garbage period. you can get a nice accurite one from walmart for 11.88 that reads cool side warm side and humidity all in one.