Step 8Make 'vent hood' out of trim ring and stiff wire
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Use the inside trim ring from the dryer vent, the other piece of metal vent tubing, and some stiff wire to make the "vent hood". Even better: make a larger hood with better capture area out of cardboard, coroplast, aluminum roof flashing, gallon plastic milk jug, or other rigid material. The stiff wire I used was the sort that is used for hanging suspended ceilings; it measures 0.105" (2.7mm) in diameter and is easy to form. I bent hooks at the ends to go through the holes in the trim ring (which I had to drill out a bit). I also used rubber bands to hold the legs together.
I used rubber adhesive stuff (like blu-tack) to hold the corners of the legs down and keep them from sliding.