Mag Chloride and Leather

Hey all,
Have any of you seen any little white spots appear on your leather? I have a sneaking suspicion that it was caused by that crap Magnesium Chloride that they use in Denver. Has anyone else seen this, or have any suggestions on what to use for cleaning it?

I see all kinds of wierd stuff after driving over that stuff. Damp soft cloth, rub 'til gone. Or any FINE leather cleaner should do the trick. Do it fast so as it doesn't have a chance to set and stain.