So, while feeling creative and bored on a recent business trip, I decided to try and make one. Here's what I did.
(My apologies for the less-than-stellar picture quality. A camera-phone is all I had with me at the time)
Step 1: Preparation
(Note: I used 60 and that seems to work well. you can use more or less, just make sure it's a multiple of 3)
Step 2: Divide and Conquer
Step 3: Making the First Strand
Step 4: Make Two More Strands
Step 5: Bring the Strands Together
Step 6: Finish the Clothesline
Step 7: Using Your New Clothesline
1: Wrapping the end around a sturdy object, pushing the knot through a hole made in the braids. It's pretty strong, and easy to remove quickly.
2: The second option isn't as quick, but it's stronger. Wrap the end around an object and run the whole clothesline through the loop at the end. Pull tight and you've got a great grip that won't slip. It's just a bit more difficult to remove.
Once the line is hung, just poke a piece of the clothing you're trying to dry through a hole in the braid. The rubber will grip it tight.