Epson C31CJ52121 Technical Reference Manual page 76

Side Surfaces of the Roll Paper Holder
If there is glue on the side surfaces of the roll paper holder or of the paper guides, wipe it off with a cloth
moistened with an alcohol solvent (ethanol or IPA).
Do not use alcohol solvents to clean areas other than those specified. Doing so may damage
or break the parts made of plastic and rubber.
CAUTION
Platen Roller and Its Surroundings
Wipe off paper dust or glue with a slightly damp cloth.
If paper dust or glue has attached to the black mark sensor, blow it off or wipe it off with a slightly damp cloth.
Black mark sensor
Chapter 3 Handling
76