Kneeling behind her, Blackwell expertly unlaced her corset, pulling the ribbons free and loosening the boned contraption enough to tug it over her head and throw it off to the side. Next, he tore at the linen buttons down the back of her chemise, sending the small pieces clattering over the floor. The dress was discarded with the corset, as well as the remaining threat of her flesh melting off her bones.
Wait, if he's able to snap his fingers to remove/ change his clothes and her clothes, why didn't he do that when she has acid on her clothes?