Oki ES 1624n MFP - Manual (Page 88)

Replacing Consumables • 88
15. Push back the toner cartridge lock lever.
16. Use the LED lens cleaner supplied with the new toner cartridge
to gently wipe the surface of the LED head which corresponds
to the color toner cartridge you are replacing:
CAUTION!
Do not use methyl alcohol or other solvents on the LED
head: damage to the lens surface will occur.