Dry peeling skin on snake

[Zexion~]

I'm a new snake owner who has been overthinking everything and I'm starting to get used to owning a snake but this one problem persists, I own a 4 year old corn snake which I bought off of craigslist as the previous owner needed to get rid of it (dumb idea I know) however it has for the past two weeks had two peels of skin underneath his jaw that protrude about a centimeter, it also had a big peel of skin flaking off his upper head but that has since vanished, now I know everyone's going to claim bad shed as that's what the Internet says but signs of shedding have appeared, no change in color no change in eyes nothing so I don't think it's that. I tried getting him in water which was near impossible as I don't have a tub with a cover big enough but that didn't help, I tried placing damp paper towels in his hide still no help so my question is what exactly is the problem? sorry if this is too much writing