I have a lawn we have been cutting at the 4.75 inch setting on an eXmark Lazer Z. The lawn has done quite well like this all season so far; however, last week we cut as usual at this height and all looked fine when we left. I went there today and it looks like we scalped it. The conditions are very dry here now and the lawn for the most part looks burned. When we cut it last week it was green and ready although things were starting to dry out, but it was still ready to be cut. Any ideas why it looks so short now?