A pan cleaning machine includes a carriage-on-track conveyor system for transporting pans through a cleaning section in a tipped or inverted orientation. The cleaning section comprises modular cleaning mechanisms mounted on swing arms, which can be actuated and adjusted by a control system based on pan geometry and debris conditions. The cleaning mechanisms include quick-release brush units and air knives, enabling high-throughput, continuous cleaning with minimal downtime. Sensor input enables automated selection of cleaning routines, detection of unclean pans or warped conditions, and dynamic adjustments during cleaning. A method of continuous automated cleaning is also provided.

A dishwasher includes: a tub that defines a washing compartment; a rack disposed in the washing compartment; a spray arm disposed below the rack and configured to be rotatable, the spray arm including a nozzle configured to spray wash water toward the rack; a connector disposed at the spray arm and having one open surface; a cap configured to cover the one open surface of the connector and coupled to the connector; a magnet disposed in a space defined by the connector and the cap; a gasket disposed between the connector and the cap; and a sensor configured to detect a magnetic force of the magnet.