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A lot of people care about using the public washing machines because of personal hygienic issues. We don’t know what kind of dirty things have been washed before we use the machines. The COGO is the smart washing machine that avoids using the same drums of public washing machines. We just need to bring our own basket with clothes and used it as the drum for the machines. When the COGO finishes washing the clothes, it will send messages through the phone application to inform the users. It is easy to use and suitable for personal and public washing situations. For public, smart payments can be made by using App.