Cinderbird,
I would just take a 4hrs and fill a 5 gal bucket up with luke warm water and pit in a 4hr movie. You will have to hold the snake and keep the portion of the snake with shedding on it under water, not the head off course. With a damp towel you just have to work it loose down the whole snake it takes time. That way you will know nothing was misted. Watch the paper towels they can cause suffocation. I'm not sure what kind of boas you have. I hope this helps i have been working with emerald tree boas since 1986 and that is what i used to do when i had problems in the past.
Ed M
www.EmeraldTreeBoa.com