For me, earworms never really go away. They just get superseded by the next one. There's always a soundtrack in my head.
Hiking seems to bring out the most persistent circular specimens, though. I find them most annoying when I don't know them properly and just keep going over the same inconclusive sequence, for ever and ever.
There is one fairly reliable way to get one to give way to the next, for me at least ... give it to someone else .
Mrs. Highlandman does not like it when I exercise this option. But fair is fair, she does it to me often enough.
-Glenn