After only about five brews, I've been finding that the little valve flap thing in my autosiphon keeps popping off. At first, it seemed to only happen when I sucked up hop matter into the autosiphon, but last night the little thing popped out while I was running sanitizer through it. I had wort chilling, so I didn't have time to spend popping it back in with a pair of tweezers as I've done before. So I tried dropping a dime in the siphon as I've read on the internet. It didn't work as well as the little plastic flap, but after a few strokes I did get a siphon started.
In summary, fixing an autosiphon with a dime does work. (I have the half inch model of the autosiphon.)