Hello, all.

I have been struggling to keep my terrerium warmer than 80 degrees. I've tried covering the screen tops to try and keep the heat/humidity in, I have a controlled UTH & CTH, multiple thermometers, and even moss to try and keep the heat/humidity consistent. Are there any devices (like foggers, but for just heat and not humidity) where it will keep my terrarium at a consistent 90F? Or any advice? What of thermostats?
I just want the best of health for my baby boy. And having his home in the late 70s early 80s temp isn't good.