I wonder when Apple will address the elephant in the room: "how can we keep our lens always clean like our SLR lenses?" iPhone is a good camera but I haven't fo

I wonder when Apple will address the elephant in the room: "how can we keep our lens always clean like our SLR lenses?" iPhone is a good camera but I haven't found any good case to keep it dust-free. It's even worse nowadays with lens bumps.