Processed metall parts such as flat springs, punching parts, punching bending parts, laser cuttings, laser bending parts, pressure springs, torsion springs, torsion springs, wire bending parts, rings or rods are often spoiled by oil or grease or inadmissible machining residues due to production. Especially in areas like electronics, the aerospace industry, the medical technology, the chemical industry, measurement and control technology as well as in the automotive sector special requirements regarding cleanliness of the supplied parts apply. We meet these special requirements by several cleaning and washing processes.