We had a brown recluse infestation once. The house had to glow with insecticide to get it stopped. The crawling of a recluse across your face at night is no fun.A bunch of that first one set up shop under the bottom of the siding on our new house. The exterminator gave them a fire hose bath of insecticide. I counted 15 of the fuckers dead on the ground. We now get regular hosings around the perimeter, and I do applications to the lawn to 20 feet out from the house. Haven't seen one since.