The grass bottom will produces thatch after grass grow for a season or two, because can not absorb moisture, air and manure the thatch then decays all these make the lawn terrible. Although spraying is a good way to prevent the grass from disease, can not effect a permanent cure. You should remove the thatch to improve your turf condition.ZS01-Hcomber is an excellent machine to dig up thatch.

ZS01-H comber is a machine with 2 functions, one for thatching and one for verti-cutting. You only need to change the blade head .It is easy to operate.