Construction dust and caliche travel further than people expect
Central Texas is building constantly, and fine limestone dust from caliche roads and job sites carries for blocks. If you live near new construction you already know it: a film returns days after you clean. Post-construction cleaning inside a finished build is its own job — drywall dust is so fine that a normal vacuum blows it back out the exhaust and a damp cloth turns it to paste. It has to come out in passes, from the ceiling down, with the right filtration, and every surface needs a second pass after the dust that was airborne during the first has settled.