Marathon grass over clay earth. What can I put on the lawn to create longer absorption? Watering too often?

Question:

Answers:
I use wood mulch and peat moss. At certain times of the year I pile on leaves and use grass clippings.

You can start making your own mulch.

Also, water in early morning hours. There is no water transpiration after sunlight is gone in evening - watering in evening is a waste of water as roots will not suck it up.
"photosynthesis".