@John V8:
On most of the liquid window cleaner is a sticker like: "not for acrylic"
@MOG 615:
It is an new car (2017) with only 1.500km. It is just about cleaning...
Normally I use products from Meguiars, but they have nothing special for this usecase...

once: Black M3W with „Jaffa“ leather; 2015
now: Sport grey 4/4 with black leather; 2017