I had the exact same question and problem when I first set up my tank. I use a CHE for the hot side, but getting the inside of his hide to 90 was impossible. My solution was to use a terracotta pot. I drilled a hole in the bottom of the the pot and set it in upside down so the snake has to enter from the top. I put this directly under the CHE and have the thermostat probe hanging level with the top of the pot. This keeps the inside at 89-90 and the top at no more than 91.5*F. I have a second pot next to the hot one with wet moss. This one stays at 84-86 just from being near the CHE. Then I have a hide mid way between the CHE and my other heat lamp that is around 82.5-83*F and one that is no where near heat that is around 80.5-81.5*F. Humidity is always between 50 and 75 depending on if he is in shed or not.