Spiders dont care and will continue to not pay rent.
I have one in every room of my house yet still get spiders every other day just hanging out on my walls and ceiling. Had a mosquito in my kitchen, a fly in my room, and the occasional 1 or 2 nats. I do not have excessive bugs so maybe it's working a little, but it is not effective on spiders at all.
Rating: 3 stars