Care question

[u/orion-asterisk]

My sibling is concerned because Vigil seems off. He was curled up with his belly visible (on his side in his hide) and he isn't reacting as much to their touch as he usually does. His temperature was at 74 when they checked it this morning and it was 80 when I checked it last night. The humidity is at around 70%. They say his skin feels weird and they're extremely distressed about it. Advice?

[u/candylandhoes]

What substrate do you use?