z writes:

WD-40 has a tendency to gum up after awhile.

I respectfully disagree. It has a tendency to disappear, and I suppose
leave any dust and cat fur it's picked up left behind as a gummy mess,
but that's about it.

Exactly. It deliberately corresponds to the first of three grades of mil
spec corrosion inhibitors, those three roughly being tackless, waxy, and
gummy/tacky.