While browsing around on Pinterest, I found an idea that I had to try: wire reinforced clothesline wrapped with yarn.
It sounded easy enough, so I decided to give it a try today. I ran into a problem right of the bat, though: I couldn't find any wire reinforced clothesline. Apparently, there just isn't much demand for clothesline materials anymore. Instead, I opted for the thickest wire I could find in the floral section at Michael's: