Well the (intriguing) title is more to bring people in this topic

I know there has already been a lot of posts on cleaning (disinfecting) an edge/a blade so that it is considered safe to shave with it health-wise, especially with ebay/flea market finds.

Some people just clean it with soap, 70% alcohol, 90% alcohol, Flitz/Maas, or barbicide... etc...

While giving blood, I asked a (french) nurse and she told me that the main risk of using a blade of unknown source would be hepatitis C (or was it B...?, I don't remember). This is because the "only" thing that really kills this hepatitis (B or C...?) is heat (about 140°C if my memory is good, i.e. 284°F).

So I have two questions:
1) Do you use heat to "clean" your (restore) blades? If yes, how? (candle, oven, lighter...?)
2) Would a quick (1 to 5 seconds) heating of the edge with a lighter damage the metal/steel properties? (I don't know anything about heat treatment and blade temper...)


Thanks all
Christophe