I got rid of pinworms by doing the following. Pinworms lay eggs on the outside of your body. Wash them off twice a day. Wash your bottom when you get up in the morning and before you go to bed at night. Either take a shower, or use a baby wipe or just soap and water on a washcloth. Then, important, AFTER you launder your underware, wrap them tightly in a towel and zap them in the microwave for one minute. This kills any eggs that are hiding in the seams. Do this for as long as it takes, and continue for awhile after you think they are gone, and no more pinworms! It worked for me . Hope this helps. Laundering doesn't kill the eggs hiding in the seams of your underware, zapping them in the microwave kills them. I only wear cotton, I am not sure you can microwave any other material.