Cleaning in bare feet

It's the strangest thing. I dust, I sweep, I vacuum and I scrub. The floor should be pristine, and yet, as soon as I step on it again in my bare feet, I manage to step on a small stone, or sand, or dog hair or whatever (don't ask). If there is one small stone like dirt item in the whole room, that's where I my foot lands. That's the problem with cleaning in bare feet.