One thing I have not seen addressed is how is case lube removed after the cartridge is loaded, or is it left on the cartridge?  If the case lube is not removed from the cartridge, it's sticky and would (I think) attract dirt, unless it eventually disappears. If the lube should be removed, how is the best way to do it?  I've been using a rag with lacquer thinner, but this is a time consuming process.  Any suggestions?