For me? I do not have to reinvent the wheel, I have no vain plan to discover America, both have been done.
Vinegar, just common, ordinary kitchen variety vinegar works, if the household variety of 5% +/- scares anyone just add water. To reduce the time stir or rub the cases with your hand, to render your cases scrap leave the cases in the solution overnight.
With 5% vinegar a reloader can clean cases good enough to load after soaking for 15 minutes then add time for rinsing and drying.
Again, for the worst of cases only. I reduced tumbling time by two days to 1 hour.