[Mikendebbie]

Looking at your profile - your unit is a 2015 3582RL…floor plan below.
Did the wet spot appear after travel?
If it was caused by rotten roof vents seems like you would see a wet stain on the ceiling.
Which floor location ? A. B. or C?
I had some water creep down the Schwintek bottom rail and a wet spot appeared at “A” due to a driving rain (well that was my best guess - it has not happened again).