I have a 2001 Extended Cab Chevy pickup with graphite colored leather seats. I have read in some previous posts about some of the newer leather seats having a clear coat on them, and that conditioners and cleaners will do more harm than good. Should I use the Zaino Z-9 "Leather Soft Spray Cleaner" and Z-10 "Leather in a Bottle Conditioner" or should I just leave my seats alone and do nothing with them?