Does vinegar clean a dirty penny?

Yes, vinegar can clean a dirty penny due to its acidic properties, which help dissolve tarnish and corrosion. Soaking the penny in vinegar for a short period can effectively remove grime and restore some shine. However, it's important to rinse and dry the penny afterward to prevent further oxidation. Keep in mind that cleaning coins can reduce their numismatic value, so it’s best to avoid cleaning valuable coins.