Hey, I have been passing these and all other sorts of otherworldly looking items since starting coffee enemas etc over 5 months ago. I dont know what to tell you about killing them since I am just trying to get my digestion/elimination in order before trying anything really harsh. I am now taking a product called ADP by Biotics which is oregano oil in tablet form, as well as Diatomaceous earth. Both natural but seemingly effective. Good luck. What made you start doing coffee enemas?