This manual is an English translation of a manual produced by the Japan Building Maintenance Association and the Japan Sanitary Equipment Industry Association, revised and published in April 2017, to inform building maintenance workers in Japan, where toilets in public buildings are increasingly equipped with spray seats. It was revised and published in April 2017 and translated into English. Nowadays, spray seats are becoming increasingly common not only in houses but also in hotels, airport facilities and other places around the world. This manual will help you with daily cleaning work.