Dust like small fibers in 7. Bezirk
We live right next to the construction site, but curiously the phenomenon doesn't appear in the room with windows towards the street (just to clarify beforehand). Since about two years, we find mostly in the bathroom (no outside windows), the toilet and the kitchen (with a window to the backyard) some very small fluff/fibers that seem dark grey. They are very short fibers, most of them between 1/2 millimeter to 2 millimeter. We are clean people and we vacuum clean the flat regularly (at least twice a week), we don't use a dryer, we have a dog, but his hair is different and we never find it that high (on kitchen island, sink, shelves). We have bought two air filters (fortunately, because I see what they catch). Is anybody experiencing anything similar? We didn't have that problem before and we haven't changed anything in the last 10 years (no new floor, no new kitchen devices). We have spoken with a few neighbours who haven't noticed anything similar, but some live 2 floors above us or further to the sides of the building/backyard.