Hi! I know exactly why he's having a bad shed. You explained in your previous thread how you bathed your snake when it was in the blue. I explained in the same thread that bathing a snake before a shed will strip the natural essential oils of the snake needed to shed properly. And because you bathed him before, he's having a poor shed now. The lubrication to allow the skin to slide off has been washed away. Next time don't bathe your snake and let him do all the work. If theres any shed still stuck AFTER the beginning if the initial shed, you can assist him then. But before is a no no.
If you can't get the rest of his shed off now, just wait till the next shed cycle and get the humidity up. He should shed everything then.
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