A pizza stone doesn't become unusable because it becomes stained. Actually, you'll find that most professional pizzerias don't actually wash their stones, but rather heat them to remove residue. In general, you never have to wash a pizza stone. You just scrape off any residue or char. Anything that's left on the surface will turn to harmless ash the next time it's preheated. But, if you choose to, you can wipe the surface with a soft, damp sponge once the stone is completely cool. Then, you'll want to allow it to completely and thoroughly before using it again. If it's not thoroughly dry, any water remaining in the pours of the stone can cause it to crack upon heating.

Regarding your desire to purchase a new stone, it looks like we do have an account for you in our system. We'll be sending you an email shortly. Just reply to it, and we'll be happy to see how we can help you from there.