eli5 How does razor blade dull on hairs when razor blades are made of steel and they are much higher on mohs scale?
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The nasty industry secret is that the blades don’t really go blunt/dull, as much as they get gummed up with residue from you and shaving agents.
You can run a month on a blade if you clean them after use. (isopropyl alcohol or similar solvent) even a thorough reverse-whipedown under scolding water helps a lot
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