i'm surprised no one's mentioned this...
those little round temp/humidity gauges on the glass there...trash 'em, they're notoriously inaccurate.
temp guns are awesome for taking temps as they measure surface temps which is what your snake is sitting on 24/7. these can be found at tempgun.com
for measuring humidity one of these would suffice...
these, & others similar to it, can be found at walmart, home depot & lowes for about $15.
the corded probe can be placed on the warm side directly over the heat pad under the substrate.
i have this model but because of my temp gun i did not need the corded probe so i snipped it off & have this device attached to the back glass of my terrarium via a 2" x 4" piece of velcro, also found at lowes & home depot.
oh & elevate the side of the terrarium you have with the heat pad underneath...or the whole thing. this allows for ventilation underneath the tank so the heat pad doesnt get too hot & malfunction. i use 2" x 2" pieces of drywall/sheet rock. those little rubber nubs that come with terrariums/tanks, they're trash...
do not let the heat pad sit on the dresser or whatever you have the tank on. that'll be a fire hazard.