A device for cleaning, disinfecting, and/or drying an endoscope consists of a basin supported on a base. The basin forms a channel that defines a teardrop shape. The device includes a lid that sealingly engages the basin. During operation, the endoscope to be cleaned is completely immersed in cleaning solution in the basin. The basin includes injectors arranged so as to create a rotating flow of cleaning liquid and sterile rinsing water or recycled drying air within the channel. The vessel also includes injection nozzles that attach to various inlets of the endoscope to inject products at specified pressures and to continuously test the tightness of the seal.