To provide an ore sheet cleaning exhaust of engine of such as an automobile and a ship to improve fuel economy of the engine, and to provide a method of using the sheet.

The ore sheet is constituted of a flexible packaging bag having an adhesive layer formed on one surface storing respective particles, wherein the particles are 30-35 pts.mass of Al2O3 particles, 11-13 pts.mass of B2O3 particles, 0.03-0.05 pts.mass of K2O particles, 0.9-1.2 pts.mass of NaO2 particles, 0.2-0.5 pts.mass of MgO particles, 34-36 pts.mass of SiO2 particles, 14-16 pts.mass of Fe2O3 particles, and 0.01-0.05 pts.mass of CaO particles. For use, the ore sheet is stuck to a radiator hose connecting the engine with a radiator, or an air hose connecting an air filter with the engine.