Every contractor has had the same experience: the site gets cleaned, looks finished, and two days later there is a visible film on every horizontal surface again. Nothing went wrong. That is simply how construction dust behaves.
Drywall dust is fine enough to stay airborne for hours and light enough to be lifted again by a door opening or a vent kicking on. Clean it once and you have only relocated most of it. It settles, gets disturbed, and settles again, which is why post-construction cleaning is done in passes.
The first pass is rough: debris, offcuts, packaging, and the heavy dust that can be removed in bulk. There is no point detailing anything yet, because more trades are still working and more dust is still coming.
The second pass is detail. Trim, cabinets, hardware, fixtures, outlets and switch plates, vents, and interior glass. This is also where adhesive, paint spatter, and manufacturer stickers come off windows and appliances, work that is slow, is easy to skip, and is the first thing an owner notices at handover.
The third pass happens after everything has had time to settle, as close to handover as the schedule allows. It is the shortest of the three and the one that decides whether the space feels finished or merely swept.
The scheduling matters as much as the cleaning. A pass run before the last trade is out is a pass that gets undone, so we plan phases against the punch list and the final inspection date rather than the calendar.