Kelly,

I had success using the electrician snake wire (Home Depot).

Over time gunk and small leaves get down the drain tube and clog it.

As for maintenance, when parking the car do not leave the sunroof open even in a nice sunny day.
Leaves and debris maybe blown in and therefore clog your drain tube.

Also I have found that once a year, I mix a moderate solution of Tide washing machine detergent with water and use a funnel and pour it down the sunroof slowly, this will remove dirt and grimy stuff (similar concept as washing your clothes). Then rinse with plain water.

You may want to unclog from below, pour some water to see whwere it comes out from below and use a wire to unclog it.


cn

Try your speaker wire, it won't hurt. It will probably kink and stop. Too bad there isn't someone out there who would make a plastic snake. Try coming up from the bottom also.
When the sunroof is dry, try using a leaf blower to clean out some of the junk in the rear area. That worked on my 780, lots of maple pin wheels. Remember, the sun roof is not designed to be water proof, that's why there are drain holes.

Klaus
--
98 V70Rawd(101Kmi), 95 854T(85K mi), 88 245(165K mi)

Pushing a wire through the drain to see if it is clogged shouldn't hurt anything as long as you don't use undue force. However, there are four drains, you can only see the front two. To access the back drains, you need to remove the sunroof. Directions are on Bay 13. If you can pass a wire through the drains, pour a little water into each one to make sure that they are draining freely. You shouldn't ever get water coming inside the car if all of the drains are clear.

Phantom