Well, I do as it's full of lead!
I skim off my dross, but before I save it, I put it in a pot and hit it with a propane torch. I bounce it around the pot, and pour off any pure metal that puddles for my next melt. What I end up with is powdery dirt, which I save.
The other day I was trying to decide what to do with the dirt, so I stuck it in a 5 gallon bucket and flushed it with my garden hose. A lot of lighter stuff floated out, and I just let the hose run for a while. I poured off the water, and rinsed what was left some more, and let the lighter stuff spill out. What I was left with was a heavy, dark, chunky substance.
I use an electric hot plate (with the thermostat bypassed) to melt my alloys, so I just stuck it all in the pot, and plugged it in. 2 hours later I looked at it, and there was a lot of lead alloy in the bottom. I poured off 5 pounds of lead, and let it cook some more and got a few more pounds before I gave up on it.
This alloy measured much harder than my normal alloy, but some of the dross was from my pewter smelting.
Anyone else remelt their dross?