I had my graphene coating yesterday, pano ihandle ang mga water spots and marks?

Kakapgawa ko lang ng graphene coating, prior to availing the service, ang alam ko lang mga good things about it like hydrophobic and glossy/shiny finish.

Nung natapos na yung service, tsaka inexplain sa akin ang mga maintenance requirement. Ang nagstick sa utak ko yung water spots and droplets, dapat idry raw agad to avoid water marks. Parang ang hassle pala. So every time pagkauwi (tuwing umuulan) kailangan idry off? If yes, anong mga tips and products to use please!