<p>During the draining process after completion of the wash process, while the machine is stopped after a portion of the washing water in the washing tank has been drained by draining water for a prescribed period using a drainage pump, the turbidity of the washing water is detected with a turbidity sensor that detects data on the turbidity of the washing water, thereby enabling stable detection of the turbidity of the washing water in a stationary state and also enabling washing that matches the soiling of the objects being washed while detecting the turbidity of the washing water accurately and stably.</p>
