I use car wash det/soapy water, a wool car wash mitt,(most have a tougher nylon "grid" on the back side for gentle debris lifting), & some elbow grease...wipe off with old stolen hotel cotton towel and apply your Fave brand of "back to black", et al.
I like Meguiar's Vinyl shine, but there are a plethora of prods out there that vary lil'from each other. Any Pep Boys, Auto Zone, etc., will have a shelf-full to pick from.
GL,md
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