A few possibilities.
Weak transformer that gets weaker as it gets warmer/hotter.
Nozzle to always spraying a good pattern.
Cad cell weak or misaligned(guessing the tech checked it to make sure its clean).
Cracked retention head.
Weak transformer that gets weaker as it gets warmer/hotter.
Nozzle to always spraying a good pattern.
Cad cell weak or misaligned(guessing the tech checked it to make sure its clean).
Cracked retention head.