Who Sabotaged Mrs. Fennec’s Machine?

Overview

Mrs. Fennec, the beautician, calls Sherlock. Her ultra techno fur machine has been sabotaged. Hermione, who was inside the machine, has had her fur singed. Who could have done this? As for poor Hermione, she's furious. How can she fix herself. And will Sherlock find a way not to make fun of her?