I had the company come out to treat ants and spiders. The tech Derek did a wonderful job. He had cleaned all windows of spiders webbing and etc. He sprayed the outside perimeter of my house and so far I have not seen any spiders and no more ants inside my house. I had decided to do the bi-monthly treatment service with the company for prevention. Love it so far being outside with no signs of these criters except for a ltitle bit of ants where my garden is at since this part wasn't sprayed due to consumption of the veggies. Overall I recommend you ask for Derek to come out to do a job well done. Thank you Derek!!!