What do you call...

...the line of melted wax that forms as a candle diminishes?

Yeah, I know it's a weird question, but it's for my fantasy novel and google was not too helpful. Is there a term for this, or is it just called "line of wax"?

Well, imagine a candle sitting on a desk, tall at the beginning of the afternoon, but as night carries on, it gets shorter and shorter. Meanwhile, the melted wax has formed a ribbon that leads from the diminishing candle to the desk, then down the side.

I suppose "ribbon of wax" will suffice.

Thanks, guys! =)