We do not store your username/age/location/bio on our systems, for guest users. If you wish to delete this information from pre-populating in your browser you have multiple options:
1. You may start/use your browser in "Private" "Privacy" or "Incognito" mode, which will prevent our website and any others from storing cookies in your browser.
2. You may erase/clear your browsing history after visiting the site or whenever you would like to clear the information.
3. Your browser may also be storing this information in the auto-complete/auto form fill. To erase those, search on Google for clearing cache/cookies.