'98 eldo sunroof grinding, won't fully open? can't see drain tubes
 

I am trying to clean out the sunroofdrain tubes in my '98 Eldo. The front tubes are perfectly visible but I can't see the rear ones. I'm wondering if my sunroof isn't fully opening. It does not close properly (when closing, it bypasses the closed position and goes to vent position, and the motor/gears grind at various positions) and I'm wondering if maybe it isn't opening all the way. Are the rear drain tubes supposed to be as easily accessible as the front ones? I can certainly continue to "manually" close the sunroof by stopping it in the right place but I really need to clean out those rear drain tubes. Any ideas?