For the most part the service does rid you of small bugs, ants, wasps, spiders and other creepy-crawly creatures. We never discussed the small worms that seem to come out of nowhere but I'll do that next time we are serviced. With the excess rain we've experienced we noticed a lot more spiders are leaving webs in our pool cage. It seems difficult for this service to remove them. I don't know if it's because the webs stick to most anything except the device they use to remove them or more due diligence by the technicians methods could be adjusted to completely remove the "stringers" that always seem to be left over. I do know that spiders, because their feet are small, are more difficult to kill and during hot humid sessions like we've been having they come out from the eves in (it seems like) more than normal numbers. Maybe a different type of spray, bait or other obnoxious poisons can be found that don't bother us Humans, are not toxic to us in the long term and are efficient at riding spiders. We seem to have lots of gecko's we don't mind having because they eat mosquitoes. Will they feed on spider meals too?