[rootar]

i always use to chuck the shaft up in my dremel and turn it on 5,000 rpm and run it in water for 2-3 min and then spray them out with brake cleaner or motor spary, put a couple comm drops and couple drops on bushing lube and they were gold,

my dad use to keep some dry ice in a brown sack in an insulated bag, and used a ladle spoon to get a little and set it on the motor's can