Clay changes the run time
Houston clay takes water slowly. One long cycle runs down the driveway. Two or three shorter cycles an hour apart, on the days your utility allows, get the inch into the root zone. A rain sensor or a weather skip should cancel a cycle after a real Gulf rain, not after a sprinkle that only wet the dust.
The clock cannot aim a head
Watering at 5 a.m. still wastes water if a head is broken or pointed at the street. Fix the hardware, then set the schedule. Call 346-642-6161 when the time of day is already right and the lawn is still striped or soggy.