Abstract: The present invention provides a liquid composition for removing dental cement from the surface of non-living objects, comprising i) an inorganic base; ii) a complexing agent; iii) optionally a surfactant; and iv) an aqueous solvent. In a preferred embodiment, the composition comprises a surfactant, and an aqueous solvent comprising water mixed with a polar solvent miscible with water, preferably alcohol. Said objects to be cleaned comprise workpieces and instruments used in restoration work. Said workpieces may comprise crowns, bridges, inlays, and other prostheses. Said instruments may, comprise, for example, tools used during the dental operation which contacted the cement.