Welcome to the site!
First off, stop bathing your snake, you are actually removing the oils necessary for the shedding process, and stressing out your snake. There are only a few reasons to bathe a snake, and those are mites/certain injuries where a betadine soak are necessary, and severe dehydration. Any other time the bad outweighs the good of bathing a snake.
1. How are you housing your BP?
2. What are you using to heat the cage?
3. What are you using to measure temperatures/humidity?
4. What are your current temps/humidity?
Also are you sure that the snake is actually shedding? ghost BP's look like they are in shed all the time.