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A lot of products work, there is no doubt about it. You could wash your car with water (water is actually an effective solvent when it comes to dirt). The question is whether or not it is best way to do it.
In terms of using Dove, I am sure that it cleans the leather but is it the best possible way? What are the long term effects? Will it dry out the leather and prematurerly age it (which would be a concern because of your choice of "crappy leather" words).
I would look into products from Leatherique or Leather Masters.
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