Keeping the Interior Trim clean

[AJKOK1]

I've noticed on the Cayman after only 400 miles a few marks on the doors ( internally) which i think are from where hands have touched or arms have been rested while driving. Nothing terrible but quite visible on the black interior. Not noticed it before on my other Porkies. Can anyone recommend the best cleaner to use on the interior trim...i don't want to spray it with something and find it goes all glossy or greasy.

BTW - 2 weeks since i got the Cayman and the smile has not diminished yet