I moved into a house that had wool carpets throughout, including stairs. It’s kind of nobbly as opposed yo smooth synthetic carpet. I’ve noticed that although we Hoover regularly the edges of rooms and stairs has built up a lot of dust, that isn’t coming out easily, even with the small hoover attachment. Tried using a scrubbing brush which kind of worked to loosen it, but did also damage the carpet loops a bit. Googled for carpet brush thinking maybe there’s a tool for this job but I missed the memo… help! What do you use? Or think might work?