A method apparatus for teat dipping for sanitizing the udder of a cow either before or after milking. The apparatus has an extension arm with a dispersion portion so that when a cow is in a cleaning location the extension arm will extend underneath a cows udder and dispersed cleaning fluid onto the cows udder. A sensing system is used that detects the rotation of the parlor to determine if a cow is at a cleaning location. Further, the sensing system detects whether a cow is present in a stall of the rotary milking parlor.