You can try to peel it off. It may come off easily. Something that works really well is to wet a wash cloth and wring it out...then just handle the snake and let her slide through the cloth while you rub it across her back. Probably take that extra shed off without the need to soak.

Just make sure you peel/rub from the head toward the tail.....and if it resists and doesn't peel back without pulling up the new scales underneath, then stop and go to plan B. (The soak)