@hamilde Dust can be a huge allergy. You can do a lot to mitigate it; things like allergy covers for bedding and mattresses, HEPA filters in your home, frequent vacuuming with a HEPA filtered vacuum. I spray fabric furniture with a very light mist of Hydrogen peroxide (from the grocery store) on fabric covered furniture only. Dust is a bit of everything from dirty air particulate to pet dander. Pet dander is saliva dried and hydrogen peroxide neutralizes that. Caution, it will eat holes in leather and react with soap residues on your hands if you recently washed them (burns), and must be kept in the dark which is why it comes in a brown opaque bottle. You also don't want to inhale it. It is very reactive and turns to water. Make sure furniture is dry before sitting on it, and use a very light mist in a hair salon type mister bottle so it barely gets damp. That helps me. I have found that the couch will accumulate a lot of dust and sitting on it seems to puff that into the air when I sit down no matter how clean it looks. I guess I can always take coverings off the cushions and wash them and try to clean the foam of the cushion itself. I am also very allergic to molds and I can miss things in the kitchen that start to become moldy which triggers an allergic response. It would be worth looking for other possible sources of mold in basements, etc or if there are any roof leaks or failure of grout or calking around bathroom tile. Drains can harbor mold that you can't see. I will use a brush to scrub inside the garbage disposal. I also spray hydrogen peroxide in the sink to sanitize it. Carpeting harbors a lot of dust and dirt. I don't have it in my house, only hardwood and tile floors.