Oki MB472dn User Manual page 737

Note
If the toner cartridge is not securely attached, printing quality may deteriorate.
11.
Wipe the lens of the LED head with a soft tissue paper lightly.
Note
Do not use solvents, such as methyl alcohol or thinners. They damage the LED head.
12.
Close the top cover.
13.
Close the scanner unit.
Memo
If you have to dispose of used toner cartridges, put them into polyethylene bags or other container, and be sure to follow the
regulations or instructions of your local government.
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