Yet another hunger strike for Wolfus

[Wolfus_305]

*sigh*
The last time he ate was January 5th.

I have not changed anything in his tank (except getting a thermostat to have better control of the temperature, but that was recent - about a month ago)

His hot side is always between 89-95 degrees
his cool side is at 85 right now
his humidity goes up to 70 during the day and dries out to 50 before I mist him again

He always has fresh water and his hides and clean substrate

I have not noticed anything different about his appearance (no mites that i could see, no wheezing/mucus anywhere, no wrinkly skin)

I've tried large f/t rats and medium ones. brown ones, white ones, brown/white ones, males, females.

Any suggestions to get him eating again?

Thanks for all the help in advance
Kendra