I wasn't confused at all, but you were talking about dust, not oil cleanup. Oil I leave alone.
As to blowing the dust around the chamber with the sensor, using a blower is the #1 way of cleaning off the sensor. If I can clean up the sensor, and obviously the surrounding area will get plenty of air too, that's far better than the other cleaning methods, as far as I'm concerned, which are for most people these days, either using a brush on the sensor, or a sensor swab with eclipse liquid on it. Most of the time for me, the blower takes care of my problem, and the camera needs no further cleaning for weeks.
I'm a frequent lens swapper and shoot almost daily.