I have silverstone leather and it does pickup blue dye transfer every so often. Plus other random marks on the doors etc being a light color.
I use a microfiber cloth with warm water every 2 weeks or so to wipe down all the leather surfaces, takes maybe 5 mins max and removes all traces. Looks brand new and keeps that matte finish. I've never used any chemicals or products on the leather surfaces before.
Did the same with all my previous cars and the leather has been pristine.
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