i am asking this for my own lawn...I rented a aerator last spring and used on my lawn when I moved in...but that was cause my lawn looked like concrete...now this summer my lawn is looking really good and the ground seems to be soft. Should I do this again? Or does it not need it? My local garden shop has these aerator strap on shoes....they have 2" spikes....just walk in the yard with them on... would those work/help??