First Impressions Series: 5

Dust. When a house lies empty here, it fills with dust. The waves crash over the sand, releasing volcanic dust. Neighbors burn stuff, filling the air with dust, cars are not too clean... The dust is a powerful presence. It layers like finely packed snow, so that by six months of being empty, our house was covered with a thin gray film.
We spent $5000 ($160) for house cleaners to come in and scrub for 12 hours. When they left, we still had to mop the floor four more times before we didn't leave dirty footprints over everything.
They missed the insidious powdery white mold that falls to the floor like flour. It grows under the edge of the counter in the kitchen, and inside the drawers. Any suggestions for killing the spores welcome.