last week, i'm driving down the road, and there is a car behind me, beeping, flashing his lights, yelling at me. i pull over. it's a fert customer. we went through this before, i do fert apps, and broadleaf weed control at his property. just started this season. i applied everything i said i would, on the dates i said i would. the property is completely free of clover, crabgrass, and all other weeds. he does have a drainage problem which i believe is the cause of the nutsedge he has. he feels i should treat the nutsedge, i don't believe it's my responsibility, unless he will pay the additional fee, which he wont. fine, end of conversation. well, when he saw me on the road and went on a rampage, his gripe was something different. half his lawn is now brown, and recovery is not likely. i went and looked, seems to be a fungus. he DEMANDS that i repair the lawn. i explained that i AM NOT responsible for fungus, he thinks otherwise. he feels that since he paid me (in advance) for fert and weed treatments, that i am fully responsible for the quality of his lawn. i disagree. my contract states that xxx treatments will be put down on xyz dates. if "any other treatments" are required, they are available for an additional fee. my first instinct was to tell this guy to go screw. when DOES your responsibility end? i don't cut his grass, so i really can't monitor the lawn on a regular basis.