Previous company I worked for we had a customer who just plain sucked to work with. One day I show up to cut his lawn and there and these dead patches in his lawn. I continue mowing and he comes out. He stops me and and starts saying that there were dandelions in the lawn some instead of picking them out like he was he went to Home Depot and bought this bottle of weed control stuff ....... LMAO!!! In my head I instantly knew exactly what he did... He continued say that he could remember the brand of the product.. I said, "round up?" Ya that stuff he replies. He continues to ask what he can do to fix like just seed over it. I told him you have to dig the spot clean of the dirt and re-loam and seed it. He did not listen and tried his way.. Two weeks or so go by and he comes out pissed!! He starts saying that the mowers and destroying his lawn and points the spots that he sprayed with round up. And he was them fixed. This guy is know to be a cheap prick and skimps everything. If he had just had a fert company take care of it.