Specifications
348 Cleaning and Transporting the Printer
7. Turn the gray part of the black roller to find the spot.
c
Caution:
Be careful not to scratch the surface of the drum and rollers. 
Also, avoid touching the drum and rollers, since oil from your 
skin may permanently damage their surface and affect print 
quality.
8. Wipe the spot off the black roller with a dry soft cloth or cotton 
swab.
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