Just a quick question.  I have had a walker mower for 2 years now and I have one customer that has complain about me leaving ruts on his lawn while i turn.  Im not sure if its something i'm doing while turning on my walker or if its the fact that his grass is quite thin and seems to be damp/wet every time we cut it.  Any tips would be great. He has told me he dosent want me using it on his lawn anymore.