When used at room temperature, an electrode has a shelf life of 1 to 3 years. In order to avoid deposits and ensure a fast measurement, the bulb and its junction and rod need to be kept moist. A special conservation solution is necessary to store the electrode. It is of special importance to never keep the electrode in distillated water. It is recommended to frequently clean the product with a special solution; an electrode with a poor maintenance or too old may increase the response time, provide inaccurate results, and require more frequent calibrations.