Abstract: The present invention is directed toward a method of cleaning an ink jet cartridge assembly and an apparatus for use in such method. The method broadly includes the preparation of ink jet cartridges for vacuum impregnation of heated cleaning solvent and use of centrifugal force to void the cartridge of solvent, ink residue and other waste sediment. During the vacuum impregnation sub-process the heated solvent boils at a lower temperature where internal agitation and turbulence inside the otherwise sealed ink jet cartridge housing causing dried ink and other residue in the ink reservoir foam pads, internal ink paths and print head assembly to return to liquid state and be discharged upon centrifugation. The invention also comprises apparatus to perform vacuum impregnation at proper pressure, spin plates to secure ink jet cartridge housing without damaging ink reservoir foam pads as pin block their discharge and optimum revolution speed can be monitored.