Lemon cleans pennies the best because of the acid in the juice.
The best way to clean an old copper lamp is to clean it with a brass cleaner to make it shiny and to remove the patina. One can also apply a little bit of lemon juice in a cup of water and use it to wipe off the green stuff. Try it first with a copper cent.
lemon juice
I use Lemon juice to clean pennys it work out great! Lemon juice has a lot of acid so it is reasonable for lemon juice to clean pennys best. Hope this answer helps you! Your friend/answer person XXFKXX
It has strong acid in it
vinegar is the best way to clean a penny out of the choices given.
Grape juice contains a weak acid called citric acid, which can help break down the tarnish on the surface of the penny. This acid dissolves the copper oxide layer, revealing the shiny copper underneath. Other acids in grape juice, like tartaric acid, may also contribute to the cleaning process.
lemon juice or vinegar and some newspaper
Vinegar, ketchup, lemon juice, and baking soda are substances that can effectively clean a dirty penny. Each of these substances contains acids or other compounds that can help break down the dirt and grime on the surface of the penny, restoring its shine.
A mixture of vinegar and salt can effectively clean copper pennies. The acid in vinegar helps to dissolve the tarnish on the pennies, while the salt acts as a mild abrasive to help scrub away dirt and grime. Dip the pennies in the vinegar and salt solution, then rinse with water and dry thoroughly.
Lemon juice works best for cleaning pennies because the acid helps dissolve the tarnish. Dish soap can also clean pennies by removing dirt and oils, but it may not be as effective at removing tarnish. Water alone may not be sufficient for thorough cleaning.
lemon juice.(:
Lemon or Lime juice I'd imagine. It's a fact though that coca cola has an amazing ability to strip the dirt off of pennies