Can someone help me please. Im a mow only company and around this time of year in KS we are getting no rain, temps in the 90s and high humidity. My yards arent burning but they are getting brown spots all over them and really thinning out. As a mower only is there something Im doing wrong? I keep my blades very sharp and I mow at 3 inches. Is that to short? My customers are getting upset and I tell them its lack of rain and high temps. Anyone have some ideas?