Immerse In-Check in warm (but not hot) mild detergent solution for 2-3 minutes (maximum 5 minutes). Agitate the meter to ensure thorough cleaning.
Rinse in clean warm water and shake gently to remove any excess water. It is important to rinse thoroughly to prevent salt spots appearing on the inside of the body and spindle.
Allow to dry thoroughly before using again.
The expected life of the In-Check, in normal use, is two years.
Ref. 1 M J Gleeson et al, Clin. Otolaryngol, 1986, 11, 99-107.