A little over 2 weeks ago, I put in a few new patches of seed where it was just dirt. I did everything required: Tilled the soil, Removed all the Rocks, put down the Scotts Lawnsoil and leveled it off and then spread the seed. I watered it in 2-3 times daily for a little over a week and it came in nice and thick and green. However, about 3 days ago I noticed the grass was getting a little brown so I watered it in. I was out last night and got home late so I didnt check it then, but when I go up this morning and the green was gone. The patches were mostly dead, and there was something in the lawn that almost looked like spider webs and hair. What happened?