<font color="blue">Plugs eject even if the soil is wettish/stickyish... ?
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I've had the best luck when the soil is slightly moist, you get the deepest penetration from the tines and the plugs eject smoothly. I aerate when there is no rain in the forcast for a few days after so the sun will dry out the plugs. Then mow the grass and the mower blades will pulverize the plugs.
<font color="blue">How about when is hits stones... big rocks... ?
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I have a slightly smaller tow behind unit and it pushes up when crossing over a rock.
Don