i have mine ceramic coated so my washes are pretty easy... here's a list of items from the place i got my x7 done at:
https://detailership.com/aftercare-p...ecommendations
I do also have the chemical guys foam soap for pre-washing (used with a sun joe power washer), but i mostly just use optimum no rinse these days w/ the hand pump.
I had found this video to be helpful and he lists all the products he uses -