During normal operation a white calcium residue will build up on the plates of the electrolytic cell within your salt generator. The cell operates most efficiently when the cell is clean so the manufacturers recommend cleaning these cell at least once a year. This guide describes how to dismantel and clean a Compupool cell. Note: some cells such as this Compupool cell have an auto cell cleaning process that significantly reduces a calcium buildup. This in turn reduces the need to clean the cell as often. Under normal conditions, a cell should be replaced after 12,500 hours of use.