I do not use the instrument on a regular basis. Is there a risk of mold forming in the measuring cell during storage of the instrument? March 09, 2022 11:01 Updated To avoid the risk of mold forming in the measuring cell, make sure that you clean your device after every measurement with distilled water or with a suitable laboratory cleaner. Further questions? Contact us via firstname.lastname@example.org. Related articles There is a coating in the measuring cell that cannot be removed by distilled water. How shall I proceed? Where can I get distilled/deionized water and a laboratory cleaner?