I have a lawn fertilizing client. New lawn installed fall 2005. New track, of course no topsoil. She called to complain, I went out & looked at it. The lawn streaked (from fertilizer). I explained this to her, gave her two options she could have me come out & put more fertilizer down (no charge) perpendicular to the stripes, or do nothing & it would fade. Her reply was "I can't believe what you did to my lawn, I'm going to call some other people". She has been a constant complainer about weeds, doesn't understand the grass isn't thick enough to choke out weeds. To boot I haven't billed her for the last application. Almost wish it would snow, by spring the streaking will have disappeared. How would you have handled it?