Individual ventilation cages ( IVCs) are currently widely used in animal facilities. Maintaining the normal function and cleaning status of IVCs has thus become a crucial task, but it is difficult for facilities without large washing quipmentto thoroughly clean IVCs. This lack of thorough cleaning brings a risk of cross-contamination of facilities, and in turn may affect the health status of laboratory animals. In this article, the author introduces some useful method for keeping functional and clean IVCs.