The 12 uses of dragon blood in harry potter?

Question:

The 12 uses of dragon blood in harry potter?

what do u think the 12 uses of dragon blood are?

Best Answer - Chosen by Asker: One of them is oven-cleaner.
http://www.accio-quote.org/articles/1999...

The others haven't been divulged. JK Rowling said "I have a very good reason for not telling you" in that interview, so it might be important.

I don't think they're big secrets or anything though. Hermione has known all the uses since 1st year, so they aren't a secret to her (so none of them are obvious like "use # 5: destroy horcruxes"). It's probably used in some specific potions or rituals or when making certain magical objects keep their magic for a long period of time. Maybe the curses in the Egyptian pyramids used dragon's blood somehow?

I say that there might be mention of it in Deathly Hallows or maybe even an unknown 13th use that we'll discover in DH? :)