Pop it into your CatGenie once every 2-4 months depending on use. Keeps your CatGenie running more efficiently. Removes lime and grime from hard to reach parts like the Water Sensor and drain holes. For use only in CatGenie units with orange control panel buttons only. Always store bottom facing up. Avoid contact and do not ingest. Direct contact with skin or eye parts may cause itching , buring and irritation.