Oh you also might have some wax in your tumbler due to the rouge
compound.... In which case I would suggest running some stainless
shot in it for 24 hours with rubbing alcohol instead of tumbling
solution, that will clean off the shot and get the wax out of any
perforations in the rubber of the tumbler barrel.
Another very good way to clean both the tumbler & the shot is with
Draino or lye (sodium hydroxide).
Rinse the shot off in plain water & wipe out the tumbler.
Place the shot back in the tumbler & add a little water.
Add about 1 teaspoonful of granulated Draino per pound of shot.
Turn the tumbler on & let it run for an hour or two.
Dump the liquid down the drain.
Rinse the shot & tumbler in clear water.
Return the shot to the tumbler & recharge using your favorite
It works for me.