Dont soak a boa that is in blue. The 'blue' is actually liquid between the new and old skin. Soaking them can remove that liquid/oils from them and really mess up their shed. A lot of people say you need to up humidity when in shed but that is only after they are out of blue and really, you shouldnt need to up humidity if the boa is correctly hydrated.
I almost never up my humidity anymore for any of my boas and they all shed fine. Same with my retic and BP. I usually try to keep around 70% humidity but with winter, i have been rather lazy and let it drop to 60-65% and have yet to see a problem. Actually my snakes seem to not like really high humidity and will push to try and get out. I sometimes spike the humidity by misting the aspen pretty heavy but i usually only do that once or maybe twice a week and then let it dry out.
And you want not pleasant.....imagine a 7 foot retic parking his bum over your bare foot and pissing on it lol. Caesar did that to me once and he also pooped on the floor once too. And a 7 foot retic can rip a small child sized poop easily haha.
And yeah, i need to get some new pics of my boas up. Gina my suriname has really grown and filled out since i got her. I need to get some pics of her and some new pics of Louie my BCL who has grown like a weed since i got him. He was really shy for a few months but has since become bold and is out every night climbing all over or perching on the litter dam looking down and he has gotten big lol.