Question: To kill an infestation of book mites.
Options:
Place a dehumidifier in the room containing the infestation, turn it up to full and leave for a few days.
Place a humidifier in the room containing the infestation, turn it up to full and leave for a few days.
Answer: Place a dehumidifier in the room containing the infestation, turn it up to full and leave for a few days.