Canon LBP3000 User Manual page 263

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5-20 Clean the outside of the printer
Firmly wring a soft cloth dampened with water or a mild
detergent diluted with water, and wipe off the dirt.
If you use a mild detergent for cleaning, be sure to wipe away the detergent with
a soft cloth dampened with water.
After wiping off the dirt, wipe the printer with a dry cloth.
Once the printer is completely dry, plug the power plug into
the power outlet and reconnect the USB cable.