A cup wash disk for cleaning a photoresist process tool is provided. An upper plate is arranged over a lower plate to define a cavity between the upper and lower plates. The lower plate comprises peripheral openings in fluid communication with the cavity and arranged along a periphery of the lower plate. A plurality of shims is arranged between the upper and lower plates to space the upper and lower plates and to define slits between the upper and lower plates. The slits are in fluid communication with the cavity. A method for cleaning the photoresist process tool using the cup wash disk is also provided.