Homeowners moving into a new build or a finished remodel almost always report the same thing: it was cleaned, and two days later there was dust everywhere again. The house is not dirty. The dust simply had not finished landing.
Drywall dust is far finer and lighter than household dust. Sanding puts an enormous volume of it into the air, and particles that small stay airborne for hours, then settle for days. Running the HVAC circulates them a second and third time, which is why the return vents and register grilles matter so much.
That is why post-construction cleaning is done in passes rather than as one heroic effort. The first pass removes bulk debris, protective film, labels, and the visible layer. The second pass, after the air has settled, catches what came down in between. Only then is a final detail pass on glass, fixtures, and floors worth doing.
Vents deserve specific attention. Register covers, return grilles, and the first few inches inside a duct will hold construction dust and quietly redistribute it every time the system runs. Cleaning them is the difference between a house that stays clean and one that dusts itself again every night.
The last thing to handle is residue, not dust: adhesive labels on windows and appliances, paint flecks on tile, grout haze, and caulk smears. Each of those needs a method that lifts it without scratching the surface underneath, which is the part where rushing costs real money.