An apparatus includes a reservoir for an aqueous salt solution, at least two electrodes spaced apart from each other integrated into the reservoir, a control module electrically coupled to the at least two electrodes, wherein the control module controls application of electricity to cause a first one of the at least two electrodes to be positively charged and a second one of the at least two electrodes to be negatively charged, and an impeller disposed in the reservoir for mixing the aqueous salt solution in the reservoir.
