I decap then wet tumble with SS pins and air dry. The brass comes out looking like brand new inside and out. I place a hundred or so cases in a 1 gallon zip lock bag and spray about 2 seconds with a dry lube. Then close the bag and tumble the brass to distribute the lube. That makes re-sizing and crimping much easier.

I've also used a Q-tip and wiped the sizing ring on the die with a little gun oil. That also helps, but the ring gets a build up of crud after awhile. With dry lube I don't get a build up.