I try to vacuum about once a week but was busy last week. Anyway, I only have a little old stickvac Dirt Devil vacuum cleaner that does not have a powerful motor. First, I always use a stiff bristled broom to pick up hair (mine since I don't have pets) This sort of works like a rug rake. Then I vacuum. So, after cleaning a little hallway, 2 bedrooms and a bathroom (and I did not shift around furniture this time), I took off the end of the vacuum cleaner to clean out the cup and filter. I was in shock because it was full! No pets, no visitors, windows not open as much since sometimes it is cold, changed my ac/furnace filter myself and the thing was full! Yuck! And, how in the world? Then I cleaned out the cup and filter to vacuum the living room, dining room and kitchen, and the cup again had a lot of dust. Ick! Don't know where it is coming from. If I had a stronger vacuum cleaner, then it would find more dust, I am sure. Carpet looks all fluffy now. I really think everything in my apartment is degrading and it is drywall dust because that is the only thing that I can think of that it could be. I use a broom almost each day to pick up hair from the carpets and floors so - it is amazing how much dirt collects in carpet.