Clean the insoles with vinegar. Using a mixture of 2 parts vinegar and 1 part hot water, soak the insoles for a few hours. Vinegar is a natural disinfectant and will work to kill the bacteria hiding in the shoes.
Huge amounts of iron are used to make steel, an alloy of iron and carbon. Steel typically contains between 0.3% and 1.5% carbon, depending on the desired characteristics. The addition of other elements can give steel other useful properties.
Coke is used chiefly to smelt iron ore and other iron bearing materials in blast furnaces, acting both as a source of heat and as a chemical reducing agent, to produce pig iron, or hot metal. Coke, iron ore, and limestone are fed into the blast furnace, which runs continuously.