The embodiments are directed to a hand-held applicator (126) for cleaning a teat of a milk-producing animal. The hand-held applicator comprises: a first housing having housing section (209) including a first end through which a disinfectant delivery line (140) extends or an electrical line (198) extends and second housing (205) coupled to the housing section and having a sealed gear chamber (216) for supporting gears (186A, 186B and 186C) and bearings. The second housing comprises a first portion (213) and a second portion (215) configured to be removably affixed in abutting contact to the first portion. The second housing has an external delivery port (579) centered between a pair of side-by-side gears. The applicator comprises a switch (232) positioned on the underside of the housing section. The second portion may include a motor mount (680) for coupling a motor (238) in the housing section.
