I would just increase the tank humidity to 70% (a tad higher would be okay) and leave it there until his next shed. You can also place some wet papertowels or moss in his hides and that will keep the humidity up in there and give him something to rub on if needed.

I'm a new BP owner, but I personally really don't like the approaches of doing what is unnatural for the snake (soaking them, using the q-tips, etc...). Can it be done? Of course it can. A lot of people prefer to do it that way. If the snake isn't hurt by anything, I think the more natural approach is best, but again, this is just MY opinion.