Abstract: A cleaning assembly for cleaning electrically conductive, flexible contact springs around the perimeter of a closure in a shield erected to prevent the passage of unwanted electromagnetic radiation. A pressurized solvent supply system and a vacuum recovery system are mounted in portable cabinet and each is connected via a flexible hose to a hand held cleaning head. The cleaning head comprises a trigger operated spray gun having a support block with a narrow vacuum recovery slot located immediately adjacent to and extending downwardly from the nozzle of the spray gun. The vacuum recovery slot is connected via an internal cavity in the support block to the hose leading to a vacuum recovery container.