Do not use anything "artificial".
Anything that is not natural is not an improvement.
Basic, quality, husbandry is what spells success for reptiles. In almost all cases OUR errors are what starts a snake down the wrong road.
Reptiles can be resilient but they can also quickly deteriorate when improper husbandry and stress come into play.
You seem to be on the right track now.
Boost your humidity and wait to see how things go.
If you are able to let the snake soak and then work it's way through a warm damp towel you can assist with a shed.
In reality soaking is not a good practice and I have never had any snake sit in a water bowl, but when situations like this arise, it is an option to improve a bad shed.
I would be far less worried about the "mess" than I would the health of the snake. It appears you are.
Work through the shed and keep the snake healthy and unstressed.
Your mess is easily cleaned up and nothing to worry about. bcr229 was right about the vacuum and I see no issues with cleanup.
The most important issue here is a complete shed. If you get that worked out you are set!