Hi all,
I too was having trouble cleaning wax and wondered how to purify it.  When
at the Heartland Beekeepers Workshop series I became acquainted with a
fellow beekeeper who has a chemistry background.  We started talking about
beeswax, etc.

She said if you melt your wax over water and acidify the water with vinegar
the impurities stay below the wax due to a chemical reaction that I do not
understand.  I haven't tried it yet but will be doing wax soon and will use
this method this year-nothing ventured nothing gained!

Coleene