This was my exact experience with range pickups that were nasty. I lessened my batch size and went back to the regular soap. I haven't tried small batch with the wax soap. I'm guessing that brass that did not start completely disgusting may give a better result. I submit that the wax soap reaches dirt and carbon saturation faster and then leaves waxy carbonized brass when done. I have yet to come full circle on testing this theory so I wont submit it as fact. Maybe my rainx soap is the issue.