Why Seattle sofas and chairs soil the way they do
Seattle's glacial-till subsoil produces a fine grey silt that tracks in from parking strips and unpaved alleys, and it settles deep in the pile where a household vacuum never reaches. Add the moss and algae fragments that come off shaded north-facing walkways nine months of the year and you get the grey-green cast so common on light carpet in Ballard and Wallingford.
None of that responds to a household vacuum, because it is bonded to the fibre rather than sitting loose on top of it. It takes a dwelled pre-conditioner to break that bond and real vacuum lift to remove what it releases.



