It's just a thought. Since pinworms come out to lay eggs perhaps u can use it as your advantage. What I mean is maybe you can put a tape or a big band aid and cover the anus area. The pinworm and eggs will stick to the tape or band aid so there is no chance of the eggs getting loose. If you use band aid then you might be creative and add someting on the gauze part to kill those suc***s. I never tried it and I don't know how well it will work out. Frequent changes might be necessary. I hope you find a way to kill them. You can do it! Don't loose faith. I hope this helps.