Clear test data from android device/phone


How can I delete test data from the Phone? Chws have submitted test data using main users instead of test users. I have archived the forms containing test data on the Commcare and I would like to know how to remove test data from the phone so that chws can start filling forms and submit real data.

They want to start filling forms with real data but they are confused because there is still test data shown on the device.