OK, now, what we want to do is, we want to rinse those walls after we've rubbed them a little bit with a cloth to loosen that dirt and grime. We're going to rinse them again, we want to get rid of that sort of sandy, grainy texture that's on the scrub that we put on the walls. And, we want to disinfect. So we'll want to start off with a clean sink of water. We want clean water to wash down those walls. So you can see this toothpaste here and goodness knows what because this is a bathroom sink. So, what do we want to do? We want to clean the sink. And you got to have something that's got a little bit of abrasion to it. Just a straight disinfectant is not going to give you anything to work with. So you need to have some kind of powder or something that gives you its abrasive. It cuts into those dirty bits inside your sink and get you a nice, clean sink. So that's the first step.