Agree with Homebody ^ ^ ^ The only other time I'd be soaking a snake is if they were clearly "stuck"- with the entire shed visibly dry & crinkly all over their body (it may look thicker also- but either way, it's nothing like a normal shed, & the snake has trouble moving)- this is a serious health issue & uncommon, but I have seen it before, & in such cases, the snake requires help- they cannot help themselves.
It can happen because of illness or because the snake is very old, & their body no longer works quite the way it should. My 23 1/2 year old corn snake (Pretzel) recently "crossed the Rainbow Bridge" but in his last year or so, he always needed my help to shed. Keep in mind that our captive pets typically live much longer than their wild counterparts- a wild snake that was stuck in his shed would be easy pickings for predators.