I had to get new clutch & brake pedal covers in my 930 for the same reason, Alan!
For what it's worth, I was just reading somewhere that in detailing efforts a 'softer' less shiney, as opposed to squeeky-bright finish on rubber and vinyl parts, is preferred by concourse fans & judges.
I wash my cars two, three times a year, whether they needs it or not, so it's a cinch I don't have first hand knowledge of such things!
MM