I use "Simple Green" to clean dies and guns. It is a wonderful cleaner and degreaser. Disassemble the dies or gun, pour SG into a pan on em' paintbrush/partsbrush to swab at em', bore brush and/or toothbrush for details, soak some more, rinse in hot water, towel dry then air dry for a while, then spray, swab, flood with breakfree CLP, let "cure" for awhile, then clean cotton rag and q-tips to remove all oil possible, reassemble. SG cuts lead, copper, lube, wax, grease, everything. Its great!
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"Always place your clothes and weapons where you can find them in the dark"
Lazarus Long