Local here!
The fine dirt is just in the air. It settles on roofs (I have a white tile roof and fight it constantly), on cars, on everything. On outdoor stuff, a good hosing once a week keeps things under control. Indoors, I use a small steamer mop with pads I can put in the washer. You have to use some sort of wet cleaning to remove it, and in my two stays at Pop I only observed dry Swiffers being used. Since the dirt is so fine and the doors are exterior, I imagine some is getting in around or under the doors, a situation that wouldn’t occur in a deluxe resort with interior halls. I have stayed at BWV since they installed hard floors and didn’t have this issue. But just one walk from the door to the bathroom to shower at Pop and I left horrible black dirt footprints in the shower as I stepped in. I think if the housekeepers had a wet Swiffer, we wouldn’t be discussing this issue.