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Tip: For optimal trimming performance, lubricate the trimmer teeth with a drop of sewing machine oil every six months.
Storage
There are several ways to store the shaver or to take it with you when you travel:
Replacement
For maximum shaving performance, we advise you to replace the shaving heads every year. Replace damaged shaving heads right away.
Only replace the shaving heads with original HQ9 Philips Shaving Heads (for AT940/AT921) or HQ8 Philips Shaving Heads (for AT893/AT890/AT753/ AT752/AT750).
1Switch off the shaver. Disconnect the shaver from the mains or remove it from the charging
stand (AT940/AT921 only).
2 Press the release button to open the shaving unit.
3 Pull the shaving unit off the shaver.