Hi ,
You mention you soak the piece overnight in adhesive removal solution (i assume you mean the whole piece),this could be loosening the knots which in turn causes shedding.
I don't even spray conditioner on the piece or let my piece soak in conditioner,i just spray it onto my hair brush and then brush it gently through the hair,i think anything besides water and shampoo(like adhesive remover,conditioner), getting at the knots,can contribute to shedding.

Regards Topcat