If it makes you feel any better, a hot summer rainstorm will cause my '97 Taurus wagon to collect stormwater on its roof while I'm at work. When it's time to go home, it can be completely dry outside and I would have no idea that a storm even occurred. So I get into my car, and immediately open the driver's window (because it's 200 degrees inside and the A/C can't help that quickly), and drive off. I take a left out of the parking lot, a right, another left, get up a decent head of steam on the main drag out of the facility, then stop at a stop sign - which is when a bucket of water comes off the roof and splashes down on the door panel and electrical buttons.
I've Never had a problem with any of the buttons ... and this has been going on for YEARS.
Footnote:
On occasion, if I think about it, I'll drive out of the facility with the windows up and snicker as the bucket of water streams down the glass on the OUTSIDE of the car. And this is not a weep-hole problem with the roof rack. The holes are clear. The water just seems to sit there until I hit that stop sign, at which time it all comes rushing forward, clears the end of the rack, and has just enough of a path to come crashing down the front pillar and through the open window. Very annoying!