Still irritated by the mess which my multiblade razor picks up, I tried oscillating it underwater. Good news, it gets pretty clean; extending its life and saving some of the fortune required to stay shaven.
Today’s invention is a multiblade razor with a handle which fits my electric toothbrush drive unit (in place of the brush head).
Attach razor to brush and hold under warm water. The resulting buzzing seems to work quite well as a way to dislodge the stubble.
Repeating this in the air afterwards holds corrosion at bay and maintains the blades for even longer.