Acetone (pure, not nail polish remover) will remove a lot of the organic and soft crud. I'd be very cautious about water, tap water has too many impurities, will cause long term damage. Try soaking overnight in closed jar of acetone, rinse w/ CLEAN acetone, then if still dirty wash off w/ dishsoap(grease remover) and filtered/purified water.
The green crud on copper is verdigris, xylene or verdi-care on that crap.

The green crud on copper is verdigris, xylene or verdi-care on that crap.



















