A service can store certain settings on your TV. These settings are known as cookies. If you enter confidential data on a page, check first whether the service stores this data in a cookie. Cookies are a risk because someone else using the same TV might use your confidential data. This is no different from the cookies stored on a PC.

To remove your personal data, go to the TV menu; [Setup] > [Network settings] or [Installation] > [Clear Net TV memory] or [Clear Apps memory].