Sometimes the grass just grows over the head a little and needs to be cut out around the heads. They actually have a tool for this, but an old kitchen knife or something would work.
When I say cut out around it, I don't mean the length of the grass. Actually cut the sod out around it. Cut out about 1/2' around each head.
When I say cut out around it, I don't mean the length of the grass. Actually cut the sod out around it. Cut out about 1/2' around each head.