Cleaning the Scanner If the quality of data read from cut sheets or ID cards is poor, scanner cleaning is required. Periodic cleaning is recommended. The cleaning period is once a week or every 2,000 checks. Turn off the product and open the scanner cover. Gently wipe the glass using a soft, dry cloth. • Do not use detergent, water, or other liquid for cleaning. Doing so creates the risk of dirt adher- ing to the glass. • If oil, grease, or other similar matter gets on the scanner glass, wipe it with a cloth moistened with alcohol. However, make sure that liquid does not come into direct contact with the scanner glass. 70