Either way, use a soft sponge to wash them with a gentle dish soap and warm water. Left alone, copper naturally tarnishes over time. To polish it, regularly apply a specialty copper cleaner or a homemade mixture of lemon juice and baking soda, vinegar and salt, or lemon and salt. Sep 5, 2017
How do you keep copper shiny?
How to Keep Copper From Tarnishing
How does copper turn green?
Copper turns green because of chemical reactions with the elements. Just as iron that is left unprotected in open air will corrode and form a flaky orange-red outer layer, copper that is exposed to the elements undergoes a series of chemical reactions that give the shiny metal a pale green outer layer called a patina. Feb 9, 2013