How does one clear a cookie?
If you are using Firefox, you can use an add-on like "self destructing cookies" -- unless you whitelist the site (like you would for FR), all cookies for the site are automatically deleted when you leave that webpage.
If you are using Chrome, you can use an extension like "Vanilla cookie manager". Again, unless you "whitelist" a site, when you "press the cookie button", all cookies are deleted.
Or you can do it manually, but that's a bit more complicated.