Abstract: A sink insert for cleaning a medical device having a lumen, such as an endoscope, includes a basin and a pump connected to the basin. The basin is shaped to fit into a sink, and has lip portions on its side walls shaped to extend outwardly to overlap side walls of the sink. The basin includes a drain formed in its floor; an additive reservoir integrally formed as a depression in its floor; additive fill lines defining pre-calibrated volume measurement areas for measurement of additives in the reservoir; a thermometer; and basin fill lines on its side walls defining pre-calibrated volume measurement areas for measurement of cleaning liquid filled into the basin. The pump includes inlet and outlet tubes for drawing cleaning liquid from the basin into the pump, and for pressurized output of the cleaning liquid from the pump to the medical device.