Some of the following (important) questions have been asked several times without a specific response, so I'd really appreciate it if you could just answer the following things:

What model analog temp/humidity gauge are you using?
Where do you place it to measure your temps? (Is it attached to the wall? On the floor?)
Do you measure both temperatures simultaneously or one at a time?
Can your snake access both hot and cool temps within that single hide? (ie. can he get his whole body on a 90 deg surface, or his whole body on a cooler surface, within the hide?)

For me personally it's hard to give you any additional constructive advice without getting more specific information such as the above, so thanks in advance.