The high polishing force of the diamond grinding grains will remove dirt just by rubbing it with water.
Test on an inconspicuous area beforehand.
Before working, please clean the dust and pebbles from the mirror and glass. Do not use on glass such as car windshield or surface treated half mirrors. Please note that small scratches may be visible on glass in direct sunlight. After use, please dry thoroughly with a sheet or machine before storing it. This may cause mold to grow