Even with proper husbandry bad sheds can happen, it's up to the snake.
Keeping in mind how uncomfortable and miserable looking they appear, the snake may rush the timetable.
Just two months ago my youngJungle Carpet spent a half day trying to start her shed. She kept rubbing and dragging her face and head on everything in the tank. No luck.
Then three days later she shed.
Experience may play into it with some snakes too, I don't know. Some younger ones my need to "learn" how to time the shed in spite shedding being an innate function.
![]()