It doesn't just wash off like they want you to believe. It shows up with this special lighting and doesn't change even with brisk scrubbing. The only time it seems to go away is as it is absorbed into the skin. Translation: Not a good situation at all. Think of all the people who are swimming in the waters even with the visible tar balls and stained sand. They think they are just washing off the toxic substances, but in truth over the days it is seeping into their blood stream.