I am going to re-examine...
My handling of the primers is pretty much restricted to taking them out of the box and putting them into the press.
I am going to verify that the fitting for the press is very clean.
I may start handling the primers with latex gloves.
I tumble the cases with the spent primers removed first.
I made a sieve which I will begin to use to get the cases out of the polishing medium.
I might also try blowing over the cases with some LP air to finalize the cleaning process.
My reading of history convinces me that most bad government results from too much government. Thomas Jefferson