It was ok in the 13.35 range. It dipped to about 13.20. A few weeks later I ran into the problem described above.

Like I said - put your car on ramps and pull your brushes. It's a two min. job if that. Sooner or later(sooner), they're going to wittle down to the point where you'll experience problems mentioned above.

You might be way down the road when it happens. Fix it now.