Maybe I just got lucky, but I never had a single speck of dust on my 10-11 year old Canon P450D's sensor (which I very recently sold). I used to travel extensi

Maybe I just got lucky, but I never had a single speck of dust on my 10-11 year old Canon P450D's sensor (which I very recently sold). I used to travel extensively with it, especially across Asia, swapping between the stock lens and a 270mm Sigma as needed. I'm not a professional photographer, so obviously never used as much as one, but it still got plenty use. Did I just get lucky?