The method of the present invention makes use of an all-automated and all hands-free, flushing module (22) with the capability of performing an internal cleansing of internally soiled components of a patient support apparatus configured for one or more of the care, maintenance or treatment of a patient. The system is configured with at least one bay to receive a patient support apparatus to be cleaned. The system is designed so that additional bays can be used to clean two or three patient support apparatus at one time. The system includes hoses supplying liquid into the bed's internal surfaces that come into contact with substances associated with one or more of the care, maintenance and/or treatment of a patient on the patient support apparatus. The system automatically goes through a flush cycle, a wash cycle and a rinse cycle. The system has extra compartments for jug washing. The system takes predetermined counts of bactericides or all of the cleansing agents, mixes them with tap water, uses the mixed liquids for washing or rinsing, and then the liquids used for washing or rinsing are disposed into the sewer system.