Patent ID: 7699938

Claim:
A method for cleaning a to-be-cleaned item accommodated in a washer tub of a dishwasher, the dishwasher including a water nozzle for spraying fluid to the to-be-cleaned item; a detergent solution generating unit, which communicates with the washer tub to provide a concentrated detergent solution; an ultrasonic vibrating unit for atomizing the detergent solution to generate a first cleaning fluid in a form of a mist; and a detergent loading cover for closing a top portion of the detergent solution generating unit, the cleaning method comprising: a first operation step which includes supplying a wash water into the detergent solution generating unit containing a detergent composition to generate an aqueous detergent solution as a column by an ultrasonic vibrating unit and to atomize a portion of the aqueous detergent solution in the order of microns forming the column to a mist which is a first cleaning fluid and returning said column to the detergent solution generating unit to form further detergent solution in the detergent solution generating unit; wherein the first cleaning fluid in the form of a mist atomized in the order of microns by the ultrasonic vibrating unit permeates into and remains in a food debris stuck on the to-be-cleaned item for a predetermined period of time; and a second operation step of removing the food debris on the to-be-cleaned item by using a second cleaning fluid, wherein the second operation step is to be performed after the first operation step.