I have helped snakes with bad sheds before. The reason humidity is important is because they are essentially breathing in water in the air to hydrate themselves. Soaking a snake can work to release stuck shed though. Let them soak in luke warm+ water and then let them slither though your grip and it will roll off like a condom. Never pull off stuck shed. Only let the snake do it with with the motion of their body through your hands. Humidity in my tubs is at a good level so I only raise when I see a snake is gonna shed in the next week. While I'm cleaning tubs & I will fog their tub (zoo med repi fogger) rather than misting because it puts micro sized water molecules in the air that the snake breathes in. As for stuck eye caps. I've heard everything from leave it to bring it to a vet. I have done this many times for peoples snakes. It is very easy if your a competent person. Soak in luke warm+ water making sure the snake gets the occasional head under the water. hold the snake firmly behind the head. gently brush a q-tip across the eye from front to back with a little twisting motion to. Very gently! usually if you have soaked enough it will just slide right off. if at any point you feel even the slightest resistance then stop, continue to soak and repeat. I know I'm going to catch a lot of crap on here for suggesting to do it yourself because it is easy to always reply "go to a vet". The vet is going to do the same thing. If you need a walk though let me know and I can call you over the phone.