4. Insert the channel cleaning brush into suction cylinder opening on control head at a 90°
angle. Using short strokes feed the brush through the instrument channel until it
emerges at the distal end. Clean bristles and carefully pull back through channel and out
of suction cylinder. Repeat until bristles are clean.
5. Insert channel cleaning brush into suction housing at a 45 degree angle. Feed brush
until it emerges at distal end. Repeat above process.