Let me know when you figure it out, because I would really like to know myself!
You see, I used to have a... ummm... water containing tobacco smoking device... yeah, that's it... that had a nice suede-covered base on it. Well, I let one of my not-so-bright friends borrow it one time. When it was returned I found wax all over the thing. Turns out the idiot couldn't find a lighter, and he kept burning himself with matches. So he got the bright idea of using a candle.
Well, we all know what happens when you tip a candle, right?