The man in charge turns the valve in the bathtub on, using his bare hands to do so. He also adjusts the water temperature so that it is not too hot nor too cold. He then takes one of the brushes, and, using one of two special bars of soap, creates a good lather and then scrubs the can from a point two inches below the top of the can. He should first soak and remove the label, and then brush the cylindrical part of the can over and over until all particles of dust, pieces of paper label, and, in general, all sources of contamination have been removed. Holding the can at all times, he then processes the bottom of the can in the same manner, being very sure that the bristles of the brush have thoroughly cleaned all the small indentations on the perimeter of the bottom of the can. He then rinses the soap from the cylindrical sides and bottom of the can.