Oki LP441s User Manual page 60

Note: If the red roller is not visible (lever cannot be pushed
down), lift the edge (1) of the dispenser unit (2) slightly
and slide it toward the front of the printer.
3. Wipe off any dirt on the print head (1) using a soft cloth
soaked with some rubbing alcohol.
Caution! Never use thinner, benzene, or kerosene. These
solvents can damage the printer.
Note: The illustration below is viewed from the rear of the
printer.
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