And soaks the carpet, etc. The tray around the sunroof has two outlets into drain tubes to the outside. Mine are at the front corners. They need blown out with compressed air from the top, or sucked out with an wet/dry vac from where they exit. Mine are half way down the drivers side front pillar. I never noticed them before. Didn't find this out until my step daughter made the windshield repair people come out after they replaced her windshield, assuming that was the problem, and they showed her, at now charge, on my auto insurance.
I, and apparently the previous owner, were trying to apply clear silicone caulking up around where the sunroof rested, to no avail. Also was told to clean the track of debris from time to time. Solved the problem for us both.