I use for flies - a zip lock bag with water in it. punch a hole above the zip and use a suction thing to put it on my window of my door of my house. flies do not want to go past it. while in Branson I saw this on a resturant door and on the door of the fish hatchery. had 2 flies in my house last year.
for crawling things outside I use diatomeicous earth. works wonderful and does not harm earthworms.