HP LaserJet M2727 Multifunction Printer series - Manual (Page 101)

2. Clean the glass by using a soft cloth or sponge that has been moistened with nonabrasive glass
cleaner.
CAUTION: Do not use abrasives, acetone, benzene, ammonia, ethyl alcohol, or carbon
tetrachloride on any part of the product; these can damage the product. Do not place liquids directly
on the glass. They might seep under it and damage the product.
3. Clean the scanner strip by using a soft cloth or sponge that has been moistened with nonabrasive
glass cleaner.
4. To prevent spotting, dry the glass by using a chamois or cellulose sponge.
ENWW Scan settings 89