372 | Maintaining Your Printer3 Turn the waste toner box lock lever 90-degrees clockwise to lock the waste tonerbox.4 Close the right side cover.Cleaning the ExteriorNOTE:• Do not use benzene, paint thinner, or other volatile liquids or spray insect repellent on the machineas they might discolor, deform, or crack covers.• Cleaning the machine with an excessive amount of water may cause the machine to malfunction ordamage documents during copying.1 Wipe the exterior with a firmly wrung soft cloth moistened with water.NOTE:• Do not use cleaning agents other than water or neutral detergent.• If you cannot remove the dirt easily, gently wipe the machine with a soft cloth moistened witha small amount of neutral detergent.2 Wipe off any excess water with a soft cloth.