Have the lawn people check your sprinklers. Their pattern is supposed to overlap. Our previous house had the problem of areas being missed. They came and changed the inserts to cover a larger area and also recommended that we put down something called Milonite or something like that. It's actually dehydrated, and sterilized human waste. That worked like a charm but it stinks to high heaven for a week or two. Also, you could possibly have a fungus problem.
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Greg
A pessimist is an optimist with experience.
"In my many years I have come to a conclusion that one useless man is a shame, two is a law firm and three or more is a congress." - John Adams
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