I keep my lawn well watered during the day (morning cycle 5 minutes, evening cycle 5 minutes). Last week I noticed that brown spots are starting to pop up. It's not like a big area that is browning out, just random spots that are a bit smaller than a football. I checked my sprinklers and they are working fine. I also noticed that only my lawn is doing this because all my neighbors aren't having this problem. The weather has been in the 90's lately but if that was a factor, I'd think my neighbors would be having the same problem. Should I increase the watering times? Any thoughts? Thanks.