Is the best diy we have for the clearing the drains of the pano roof? I ask because I have a "tiny" collection of water after big rains between the left rear door and the body. When I open it I get a little puddle that drains out. Was wondering if its a clog.

...and didn't mind it too much until my bro-in-laws car needed 2k$ worth of electronics replaced (2011 535 wagon) today due to pool of water from clog in battery and module area. Ouch.)

Thanks,

Joe 2008 4.8