I remember I've always been told not to use a knife to cut hot things or put it into hot water as it dulls the edge (for the metal expands due to raised temperature). Does it apply to straigt razor as well ? When i watched some shaving videos it was said to rinse the blade in warm water. Can this dull the blade ?
When my father taught me how to shave many years ago (with multiblade razor) he told me to rinse the blade in cold water only. I'm confused somewhat now...