I had a new lawn laid 2 months ago, which I have been watering daily during the hot weather. I have mown it three times now as it is growing quickly and looks very lush. When it is mown, it looks very patchy with lots of dead brown matted grass.This is hidden within a couple of days with fresh growth.
Is this normal for a new lawn? and how do I get rid of the dead grass, as I can only assume it will start to choke the new groth over time.

Thanks in advance.

Yvonne