Last year I mentioned that we now blow the holes into the sand vs. dragging them in. The first pic shows how we blow the sand into the middle of the green. The second pic shows us blowing the sand back to the outside like splitting the red sea.
With all of this work, the greens go from looking covered in sand to beautifully filled aeration holes.
Below is a video of me making one pass with the blower to give you an idea of how we are doing it. You may have to turn your sound down as the blower is pretty loud.