Abstract: The invention is a method and apparatus for cleaning and disinfecting laparoscopic surgical instruments. The method comprises the introduction into the interior channels of the instruments of cleaning fluid heated at a predetermined temperature, and activated of the fluid by the introduction of sonic energy into the fluid at varying frequencies. The apparatus includes a unitary cleaning enclosure containing receptacles for holding the laparoscopic instruments in a bath, and for directing cleaning fluid from the bath through the interior of the instruments while providing a source of ultrasonic mechanical energy to the cleaning fluid both inside and outside the laparoscopic instruments.