It's a 2014 thread. But maybe someone knows about dried superglue and acetone. Loctite says it will work. https://www.loctiteproducts.com/en/k...uper-glue.html

I like the hot melt glue idea. Is a hair dryer hot enough to melt the glue? I'm guessing it is. It might be tricky to get all the residue out of the bolt. Maybe some Q-tips after heating the bolt with the hair dryer?