I use the Optimum Power Clean mixeed 3:1 for most cleaning.
On leather or vinyl I would try 10:1 first as you don't want to lift thee colour.
I use the Optimum APC for many applications and find different diluton ratios make a big differennce.
Still learning which works where but have spray bottles with 1:1, 3:1, and 10:1 pre-mixed.
