from the link: "I put tap water on a plastic glass ,and then add oil of oregano to brush the teeth.I have observed that the water after 3 -4 days if not thrown at the sink,it turns into a purple colour.Whats also this purple colour?"
Maybe Mh will use this new knowledge, to start selling oregano iodine. If so, I think pandysilios deserves to be paid a royalty fee for the discovery.