Quoted from DennisDodel:lately I've been seeing quite a few bingos with crumbling cloth wire. Just turning to dust when touched
Yes, particularly older (50s) games. Like this one! Take a look at the replay register wires to the left in that photo. They look like fall-apart candidates to me.
In my opinion (for whatever that's worth) - don't scrub the harness. It's not going to make any situation like that better. I know, I know - there's dirt there.
@okorange, do you scrub all of your harnesses?
DennisDodel how about you?