How can I remove an object rolling around the driver's side air vent?

The first thing that I would try is using my flexible magnet and fish around a bit and see if I get lucky.Another less intrusive thing to try is to take shop air and an air nozzle and blow air in through all of the vents to see if that works.And if all else fails a piece by piece disection is in your future.I hope your luck is good!

agree with #1