All glass pH electrodes need to be stored properly to guarantee an accurate calibration and to protect the pH electrode from premature failure. A few drops of storage solution will maintain the hydrated layer on the glass bulb and prevent the reference junction and electrolyte from drying out.
It is also important to maintain a clean pH sensor. Any coating to the sensitive glass bulb or clogging of the junction will impede the electrical circuit, resulting in erratic and misleading readings. GroLine cleaning solution is formulated to remove soil and humus deposits to ensure the maximum performance from the pH electrode and provide readings you can depend on.