Ive cut the keel protector off where it has become unglued, provided enough of the protector is there provide the protection the keel needs. Ive also attempted to clean up the surface and the keel protector, and attempted to “re-epoxy” it back on, which did not last long. I suggest one of two things, start over and install a new one, or get a Hambys installed. Knock on wood, but in the many years Ive run a Hambys Ive never had any problems.