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By the way, while we are on the hot water subject...I have found that if I use water that is too hot the blade will heat up and when I put it to my face to make a pass, the hot blade almost feels...

The hot water heater in your faucet does not get hot enough to effect the edge of the blade. The microstructure of the steel won't begin to change until it reaches around probably 300 to 700 degrees...