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How to clean the optics section yourself during copier maintenance. Cleaning the scanner's mirrors is of great importance to the quality of copies and prints. If the copier produces a gray background or stripes on the copy, make sure the mirrors and glass are clean. Copier Ricoh MP C2503, C2011, C2003, IMC4500, IMC4000, IMC3000 The procedure is valid for all copiers. They don't use toilet paper because it leaves dust on the mirrors. Use a lint-free cloth for the scanner and glass cleaner.