Why cleaning too soon wastes the effort
Fine dust generated by drilling, cutting or sanding remains airborne for a considerable time and continues to settle for hours after the work has stopped. An area cleaned within that period will have a fresh layer on it by morning, and the client will reasonably conclude that nothing was done. Waiting until settling has finished, which usually means the following attendance, produces a result that holds.
Where an area has to be usable immediately, the sensible approach is two passes: a functional clean to make the space usable, then a proper clean at the next attendance once settling is complete. That is stated to the client so the first pass is understood as an interim measure rather than being judged as the finished result. Managing the expectation is most of the work.
