Philips HQ 6990 - Manual (Page 13)

 Clean the trimmer with the cleaning brush
supplied.
Tip: Lubricate the trimmer teeth with a drop of sewing
machine oil every six months.
storage
1 Put the protection cap on the shaver to
prevent damage.
Replacement
Replace the shaving heads every two years for
optimal shaving results.
Replace damaged or worn shaving heads with HQ55
Philips Shaving Heads only.
1 Switch off the shaver. Remove the mains plug
from the wall socket and pull the appliance plug
out of the shaver.
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