I think the cleanliness of the tires has something to do with it also ...
One of my favorite products for cleaning tires is still Westley`s Bleche White.
I understand it can be hard on some wheels and I am carefull how I use it.
I have tried Simple Green, Meg`s APC and many other cleaners but always come back to Bleche White cause I melts away all the brown stuff and leaves the tires ready for a good application of dressing.
Once again ... Just my opinion.
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