Stop someone from streaming on a fire stick using my account

user_qfzmb4 Thanks for reaching out for help with removing a device streaming with your login. This link walks you through how to "remove downloads" which is the same as logging the device out https://www.xfinity.com/support/articles/manage-authorized-apps-devices. Once that is done, I would recommend changing the password so they can't log back into the app after. Please let me know if this helps resolve your concern.