cleaning pistol dies
NVMM--Funny you should ask! I had the same problem just yesterday! A .45ACP taper crimp die, which as I was putting it away after a loading session I noticed a buildup of bullet lube 'way up by the bullet seating part, which I hadn't been using. (Seated and crimped as separate operations.)
Anyhow, I first tried rubbing alcohol and a Q tip, which got most of the bullet lube out, but not all. Picked out some of the bigger chunks with a pointy instrument after the alcohol had softened their grip. Then tried Butch's Bore Shine with a new Q tip to finish up. Wiped the pieces as dry as possible with a rag when clean.
Had best results when I removed the bullet seater so that the die was an open cylinder--could see much easier what I was doing in there, and clean off the seater separately.
To remove the cleaning liquids, I placed the die pieces on a hot-air register; left 'em there until they were almost too hot to handle; reassembled; put die back in its box. Problem solved.
Bottom line: Really this isn't much of a chore. Next time I'll skip the rubbing alcohol and start with the bore cleaner.