Can some one help advise me? I just bought a Ryan V aerator 2006. It runs great but only puts holes in the turf and does not leave plugs on the surface of the lawn. What an I doing wrong? The tines look new. There is dirt stuck in the tine but never pushes that dirt out and left as a plug on the surface. Do I adjust the deepth? Or what? The ground is soft. I am in the Chicago suburban area and it has not gone below 40 degress yet. It has been 50 plus degree for a week. Thank you in advance.