Is it ok for the vinegar to steam?
Not sure what is meant by the previous solutions: "soaking parts in vinegar" or "running vinegar thru it" or "power blast"

I took the scunci apart as recommended and my piston is definitely stuck. There doesn't appear to be anything you can clean. You can't really soak the piston. I filled the scunci with vinegar. Not sure what to do next.

New Jersey Mom, March 2009