There's Something Rattling in My Dryer Vent Tube

I've long had problems with the plastic ones coming loose at one end or the other, so this past Summer I put in an aluminum tube, and *screwed* it in place at both ends.

Now I have something blowing around in it. Even on high, it won't blow out. I may have to move the dryer and unscrew the tube to get it out and to stop the noise.

This is my punishment for being thorough...

Interesting Terrain on Mars

At: http://themis.asu.edu/node/6046