The gentleman that came out explained to me that spiders were difficult to treat because they shed their skeletons and do not Osborn the treatment. I have spiders in my bathroom and on my lanai. He swept down the lanai but has done no good. I do not have a pest control in my house except for the car spiders. He said I might need to seal some stuff up in under the sink area. I no longer need the pest service since it did no help the problem.