Philips HQ6900 series User m User Manual page 7

4 Remove the shaving heads (cutters and guards) one by one and clean
them with the cleaning brush supplied.
Note: Do not clean more than one cutter and guard at a time, since they are
all matching sets. If you accidentally mix up the cutters and guards, it may take
several weeks before optimal shaving performance is restored.
5 Clean the cutter with the short-bristled side of the cleaning brush.
Brush carefully in the direction of the arrow.
6 Brush the guard.
7 Put the shaving heads back into the shaving unit. Put the retaining
frame back into the shaving unit, push it down (1) and turn the wheel
clockwise (2).
8 Put the shaving unit back onto the shaver.
Extra-thorough cleaning
For extra-thorough cleaning, put the shaving heads in a degreasing liquid
(e.g. alcohol) every six months. To remove the shaving heads, follow steps
1 to 4 described above. After cleaning, lubricate the central point on the
inside of the guards with a drop of sewing machine oil to prevent wear of
the shaving heads.
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