Jake,
Watcha using to wash/rinse your fired cases?? I've seen a ton of recommendations pertaining to what/when/where/how to rinse fired cases. If you watch at a match, there are all kinds of folks dragging all manner of small jug of concoction around and dutifully dropping their fired cases in after each stage. OK, I suppose. If that is what one learned first, a long time ago, and believe in, go ahead. Wasting yer time though. Here be the secret sauce.
During a shooting session, or a match, even a multi-day match, I just throw my fire brass inna bag and save it for later. Just take it home wid me. When I get home, I dump said brass inna sink (DO NOT do this inna Kitchen Sink. She will KILL you) with Hot water cut about 50/50 with white Vinegar. Let it soak about half an hour and rinse. Dump it onto a rimmed cookie sheet and stick it inna oven for an hour at 180 degrees to dry, run it through the tumbler. Some time I still get a tiny amount of green stuff. I don't care. It doesn't matter. Going to load them up again and shot them in a week or two anyhow.
Anyway, this was a long drawn out dissertation to suggest if your using plain dish/laundry soap and water ........ ah don't. Just Plain water and Vinegar then tumble. Oh, forgot, I only leave the cases inna tumbler for about an hour .... unless I forget to set a timer (Alexa).