Check sprinkler filters and nozzles for clogs from particles or difficult water scale

https://marcowrav984.brightsora.com/posts/preventative-lawn-sprinkler-maintenance-that-conserves-water-and-money

Check sprinkler filters and nozzles for clogs from debris or hard water scale. Routine cleaning restores spray patterns, improves potency, and stops misting that wastes water to evaporation.