Do you have a lamp that emits a lot of heat ? Because that dries up the air pretty quick within the tank. But 60 percent should be giving you good sheds, though people recommend bumping it up to 70 during shed cycle.
We do use a heat lamp for ambient heat. It's the red one and we use it 24/7 to maintain the right temp inside his enclosure.
Try and swap out tin foil for plastic wrap to give a better seal for humidity. Most people recommend a fitted plexi glass though for better results.
i did have cling wrap on it at first but it wasn't holding the heat in like the tinfoil does. I'm going to go hunting for some plexi glass to fit perfectly. Should I get 2 pieces (one on each side of the light) or one piece with a cut out for the lamp?
Also Sphagnum moss around the enclosure and some inside one hide to make a humid hide.
If all else fails try and up the humidity within the room itself via humidifier or something lol. Or if you're willing to spend a bit of money get an automatic mister system.
Moss AROUND the hides! I haven't tried that one yetthanx!
Also if your humidity gauge is one of those analog ones, try and invest on digital cause you might be getting wrong readings idk.
i have a digital one, it also has a probe to measure the heat above my UTH. Mayr I will get another one just to make sure it's not acting up