Preferred organic liquids include methylene chloride and monohydric C -C alcohols such as methanol, ethanol, propanol, isopropanol, butanol, and blends thereof. 1f desired, the immersion in the liquid can be used in conjunction with an ultrasonic device that acts upon the liquid and the electrode that is immersed in the liquid to thereby aid in dislodging contaminants that are adhering to the elec