Make a silver ioniser.

This is a device I built a long time ago to see if it had any effect. The idea was that by applying a small DC current between a blunt silver electrode and your body a small quantity of pure silver would be electrolytically diffused into the area of contact. Silver has strong antibacterial properties, so it could effectively sterilise the area by impregnating it with the silver.
The circuitry is very simple. A 9V PP3 battery, a resistor to limit maximum current, an LED to indicate current flow, a metal case to make a hand contact and a pure silver electrode to make the other contact. The silver contact is positive with respect to the case.

I got my 2mm diameter pure .999 silver wire from Baird & Co bullion merchants at their Glasgow branch. (Mitchell Lane in the city centre.) You buy it by length and pay for it by troy ounce. You only need about 40mm (1.5") to make a complete folded-end electrode.

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