A few years ago Bill Pohl, a good friend of mine and of mechanical
music, gave me for a Christmas present a set of calliope pipe cleaners
that he had made from the older pop-top soda (or beer) cans.

These were the pull tabs that actually pulled off the can.  He
then bent these, put a black tape around the ring to fashion a finger
handle and bent the other end with a slight curve -- in different arcs
of the curve these would serve to clean the dust and junk in the slot.
I still have them and they still work great!

I can't find these types of cans anymore as they presented a problem
with people swallowing them.  (I guess they would have 'clean pipes'
if they did, though -- he-he!)

Ron Bopp