The two particular yards that I do are fairly picky with there lawn. They are related to each other. One guy watches me from start to finish and the other just looks around and ask questions because he isnt satisfied. The only thing that they arent satisfied with is the height of there grass. When I cut the first houses lawn, I cut it on 2.5 setting. She then ask if i can cut it shorter next time and I said yes..... She reffered me to someone in her family a few days later. I started to cut his grass at 2 on accident. I noticed after about 10 feet that it was on 2 because it was leaving small rivots and/or turning the grass yellow in spots. I then set it on 2.5 and finished his yard. When I was done, He ask me to cut it shorter next time. My question is, Do these people not realize what cutting it lower will do? Do they care more about tall grass then the yellow spotted grass? Also, I cut these two yards bi-weekly, Wont the yellow eventually go away if its cut weekly?