stains on running boards?

[jago]

hi,
shortly after receiving our new x5, wife and i noticed what i thought was condensation on the metallic finish of the running boards.
turns out there is a stain, looks like maybe soap or wax splash, that may have happened after she visited local hi-end car wash. our selling dlr takes their cars there too, and i have gone there for years with good cars, and no probs.
i didnt want to touch it so we brought the X back and dealer tried cleaning it off (maybe uased Klasse or similar, idk) but now its back.
any ideas? this seems stupid.
thanks , j.