Welch Allyn Ear Wash System Directions For Use Manual page 20

16 Welch Allyn Ear Wash System
Caution If hard water/ calcium buildup is a concern, a solution
of 100% vinegar can be substituted. Allow the vinegar to soak in
the chamber for no more than 2-3 minutes. A final flush of
isopropyl alcohol is required.
Caution Do not use solutions that contain chlorohexidene.
Caution Do not sterilize the unit with other methods such as
ETO or autoclave. These methods may damage the unit.