Using a clothesline is easier than people think, and saves 100% of the substantial energy used in a dryer. In my previous instructable on this topic, I explained how using plastic hangers can make using a clothesline as easy as using a dryer. But at least one reader had trouble with hangers blowing off the line. I haven't had that problem, but for those of you that do here's a simple solution.
The simplest and cheapest is to use a rubber band, but I had trouble with the rubber bands breaking. The best solution I found (after experimenting with the options shown in the picture) turned out to be adding a tighter hook that grabs on the clothesline.
Step 1: Materials
1) Plastic hanger (metal hangers rust and stain clothes).
2) 19 gauge or heavier stainless steel wire. Lower gauge numbers are heavier wire. It should be stainless, again so it won't rust and stain clothes.
Step 2: Bend the Wire
Bend the wire as shown below. The part on the right helps keep it from flopping around. It's easiest to start in the center of the wire, make the hook part, and then attach it to the hanger.
Step 3: Use It!
When you hang it on the line, use the new tight hook. Adjust the tightness as needed.
Step 4: Another Option
Here's another kind I tried, but it's not as good. It allows the hanger to move around, even though it won't fall off. And even though it's designed not to look on a closet rod, sometimes it bends wrong and does hook on when it shouldn't.