When a shift routine is not being executed in an automatic transmission and a difference between an actual turbine speed and a calculated synchronous speed is equal to, or greater than, a preset value \u03b1, a difference \u0394NT between an estimated turbine speed and the actual speed when the automatic transmission is in a neutral state is calculated. The method may include creating a plurality of outgoing data packets having an outgoing time stamp and a group identifier. The water is directed upwardly through a foot platform on the lower frame, and also through a lower brush onto the footwear sole, the resulting splash causing water to wet two side brushes that are oriented to bear upon the sides of the footwear. An anchor portion remains fixed to the substrate.