It's not just living on a houseboat that seems to attract spiders - there are plenty ashore too.
Fortunately, our mains-powered ultrasonic repeller plugs easily into any wall socket, emitting an effective discouragement to arachnids with a coverage of up to 250sqft.
Mains-powered Spider Repeller features:
Inaudible to pets.
Spider Repeller measures 2¾" high, 2½" across.