I've heard bad things about people using
Certain substances for enemas. I'm sure water is safe though. Also, read up on veganism (or raw veganism more ideally, but best to start at veganism). If ur a meateater, that's a major source of worm eggs, is in meat. Check out this article about parasites in meat: http://www.ener-chi.com/death-in-the-meat-contaminants-germs-and-parasites/
So eating meat will only fill a person up with worms no matter how much they get rid of them