2 days getting the shed off? Sounds stressful for the snake.
Here's what I do
sterilite tub with lid
1 to 1/2 inches of 85 degree water with a towel on the bottom and if you have it one of those useless half log hides they help the snake rub off the old shed.
Place log in and snake in and close the lid for 30 minutes and then replenish the water for another 30 minute soak.
By the time the snake soaks for an hour the shed should be all of the way off or be super easy to help off with.
This is a pretty stress free way of dealing with bad sheds.