Clean the food slicer regularly to prevent the accumulation of food residue. The circular blade must also be cleaned regularly as described below to prevent its surface from rusting. Wipe down the housing and all removed parts, including the circular blade, with a damp cloth. Give all removed parts, including the circular blade, a thorough wash in warm soapy water. Grease the circular blade’s gear wheel with a little ritter maintenance grease alternatively with a little Vaseline.