Yup, washing them in the sink or a bucket will work just fine. The only part that should touch the case during de-priming is the pin and shell holder. But dirt in the extraction groove will misalign the case mouth and make it more difficult.
Clean cases are happy cases.
Shiny cases are better!
Sorry, y’all, but I know for a fact these shoot better than dingy, dark cases.
“When you look good, you feel good. When you feel good, you do better.” ~ Grandma R.
“And if I don’t win, as least I’ll look good not doin’ it!”~ Me