Har-Tru does not maintain itself. Left alone through a busy Saturday, the top dressing migrates to the baseline corners and the court plays two different games at either end.
So the grounds team brushes and waters on the hour, every hour the gate is open. It costs us a member of staff on the roster all day, and it is the single thing visiting players comment on most.
In winter the two covered courts get the same treatment on a slightly longer cycle, because less evaporation means less watering and more brushing.