 It forms what's called biofilm, which is a matrix, a colony, so to speak, of all of these nasties that are grouped together, and they are almost impervious to the vast majority of products that are out there. A lot of products go out there, and let's talk washing machine, for example. There's a lot of products out there that you put a little tablet in or some powder or whatever, and it makes your washing machine smell good for a week or two.