If you see ""mountains of sand" and "heaps of dust" in a house that is cleaned three times a day and no one dares to breath there's something seriously wrong with you.

She wrote manuals how to clean everything, how many times to wipe a door, etc and counted it. You had to do exactly the time she wrote down/had in mind about cleaning it. If you were faster or slower it was not clean. Fact was it was never dirty.