Let that sustrate dry a bit.. Let the hide dry a bit.. I dont want you to go spending more money when idk if your hydrometer is reading wrong..
None of these are perfect.. I use all Acurite theremomerters with cool temp, hot probe temp and Humidity and even those can be off by 5 degrees or %. Between my Hyrpstat, theremometers and Laser the same spot is 88-96 & 91. All I can say is at 55% my enclosures are dry so let yours dry up and kinda start over.... If you have to mist more during the 7-10 day Shed so be it, but dont over think this right now I say. Your doing great and you have things 100x's better than ive seen a lot of snakes kept, they will survive ok even when things arent perfect. Nothings perfect even in their natural habitat.
I use & order these ($20) they ship to the store or my house Free. If you find them on Amazon for $16 like I did once they ship free if you soend $50 i think. I bought a bunch for all my enclosures though....
https://m.lowes.com/pd/AcuRite-Digit...meter/50425266