HP 220240 - Manual (Page 174)

6. Clean the discharging pins (in the groove) using the brush end of the
cleaner.
CAUTION:
You must lift the brush over the separation wires as you
clean along the groove. Be careful not to break the wires as you clean
the discharging pins.
MLO-004876 (Figure 7-21; 20 picas)
7–18 Operator’s Guide