Well, I've helped my Blue beauty rat snake by soaking him a couple of minutes in cold/luke water and then make him wriggle over and over again through a wet washing cloth until everything came off. But she already shed a piece, I don't know if this would work for yours 'cause to me it looks like yours didn't shed any piece, does it? You can always provide it with a plastic box with wet papertowel or aspen and a lid with a hole so she can lay down in a very moist environment. Instinct should make her go into it I guess.... But the misting is a good thing to start with!
Does the other corn shed well?