Only guessing, but I think it is because the air is cooler than the ceiling when you’re running the AC. Condensation happens when warm air meets something cooler and drops its water as the thin film of air near the cold object cools and loses its capacity to hold water.
If you only run AC while in the shower the walls/ceiling haven’t had time to come down to the same temp as the cooled air and condensation can’t happen because you will have cool air meeting a warmer object.
Only guessing, but I think it is because the air is cooler than the ceiling when you’re running the AC. Condensation happens when warm air meets something cooler and drops its water as the thin film of air near the cold object cools and loses its capacity to hold water.
If you only run AC while in the shower the walls/ceiling haven’t had time to come down to the same temp as the cooled air and condensation can’t happen because you will have cool air meeting a warmer object.
the ac ends up blowing on my feet somewhat so maybe the condensation is happening within the shower.