I have a Frontier Aerator that I'm really struggling with. I've tried 4 or 5 times over the last two years to get it to throw plugs like it should but it just doesn't work. The steel spoons just get packed tight with dirt and it just pokes holes in the ground. The dirt gets so tightly packed in the tips that it's actually challenging to dislodge the dirt with a large flat head screw driver. If anything, it seems like it's working like more of a compactor since it doesn't leave the plugs on top of the soil. I've tried varying amounts of weight on the unit and also tried varying states of moisture in the soil. I just can't get it to throw plugs. Any ideas? Here are some pics of the spoons and how it just seems to poke holes and not eject any soil. or plugs.