The dry-ice sublimation-impulse cleaning (DIC) technique using a two component ring jet has been proven as a highly efficient cleaning process for niobium and copper surfaces. The liquid carbon dioxide flows through a ring-type nozzle assembled in a purpose-built cleaning head, expands to form a dry-ice / gas mixture and is accelerated by the surrounding nitrogen. A set-up for the HORIZONTAL cleaning of single-cell niobium cavities has been successfully commissioned during the last years. A preliminary parameter set for effective final cleaning is established. Several cavities have been cleaned and tested without any detectable field emission up to 36 MV/m. As application of the DIC technique might result in additional cleaning potential for accelerator structures, an extension of the set-up and testing of nine-cell cavities is planned until mid of 2008. Furthermore, DIC was applied to the copper injector "gun" cavity for TTF/FLASH [1] recently. In order to reduce the dark current of the gun cavity, a vertical cleaning setup was developed and tested.