Year-old corn snake

[Countach]

Sometimes snakes recover from minor RI's with a little more warmth, so to encourage him to use his "warm hides" you might try filling it with damp sphagnum moss.
Garden centers & florists carry it, besides pet stores: soak it thoroughly, then drain out most of the water before installing it. I bet you'll find him in there, & of course,
you'll have to keep misting it (or re-soaking it when he comes out).

Another possibility is that he has old stuck shed (especially in his nostrils) from insufficient humidity...and damp moss/raising his humidity can fix that too. I love corn
snakes, I hope you do well with him. Previous owner (or store?) may have kept him way too warm &/or dry. I hope this is an easy fix...and I definitely wouldn't rush to
a vet before you find out if symptoms are from an incomplete shed. Now if you see his mouth bubbling or with mucous, that pretty well identifies an RI, but try this ^ ^
first.

I'll try raising the humidity a little, and use moss in the cork bark hide. I agree it could be stuck shed, he seems active and I haven't seen any bubbling. Keeping a close eye on it. I'll try to encourage him to use his warm hide, but he always seems to end up back in his burrow lol.