Hi
I had the same problem with my BC9300, about 2 years ago.
I used Silicone Spray very gently and sparingly on the fabric cables and plastic runners. Silicon Spray is non-invasive, and also preserves fabrics and plastics.
The problem was solved immediately, and has not returned since.
Menahem
Learn from the mistakes of others - you'll not live long enough to make them all yourself!