A water nozzle is attached to the mower deck of vegetation mower that extends into the interior of the mower deck housing. Water is channeled into the water nozzle and is diverted laterally out through an end of the nozzle toward the mower blade in the housing deck for use in cleaning the interior sides of the mower deck housing. The water may contact the mower blade to be propelled to the sides of the mower deck housing. The nozzle may be rotatably attached with respect to the deck to use in manually turning the nozzle cleaning the entire periphery of the interior of the mower deck housing.