"I used to get persistent brown areas in my lawn."

I'd like to think that I keep a fairly nice lawn. However every year as the Summer progresses I used to get persistent brown areas in my lawn that I couldn't get rid of despite my best efforts. Not everywhere, just a few areas. Eventually I found this.  Yes, its cosmetic but who cares?  Its an easy, cheap fix that works and lasts! I'm happy. Bertie Sanmogan Richmond Hill, Ont.