Philips KV-S5055C Service Manual page 36

Note 3: In case that a scanning problem on the image quality (line) or on the performance of conveying
still occurs,
with a vacuum cleaner, remove any staples and paper dust inside and outside the scanning glass,
being careful not to scratch the glass surface or its surroundings.
(Don't clean the glass surface or its surroundings with the included Blower.)
*2
Note 4: Direction for wiping rollers
36