Canon Color imageCLASS MF8170c Basic Manual page 112

Use a soft, dry cloth and wipe off chipped paper and toner that are
attached on the transparent sheet located at the front of the roller.
WARNING
Clean the machine using a soft, dry cloth. Do not use alcohol, benzene, paint
thinner, or other flammable substances.
IMPORTANT
Take the drum cartridge out of the protective bag.
8
Open the protective bag with scissors, so as not to damage the cartridge.
IMPORTANT
8-24 Replacing the Drum Cartridge
Be careful not to scratch the transparent sheet or peel it by force.
Do not wet the cloth with water or detergent.
Be careful not to touch unnecessary parts in the machine when cleaning.
Keep the protective bag in which the cartridge came in. It may be required when taking
out the drum cartridge for machine maintenance.