I think the factory seats crack & wrinkle no matter what. I used 303protectant, Maguires conditioner...nothing helped. The pass & rear seats still look new because no one sat in them.
Like the others have said, Lexol is awesome. I used a conditioner every week on my old 04 and it still had bad wrinkles within a year of owning it. Mustang leather is a joke, it would be too ****ty for a 10K kia.