Wring the excess water from a hot, soapy cloth. Rub the surface of the table with the cloth to remove any dirt and grime.
Spread 1 to 2 teaspoons of table salt onto the surface of the table. Pour 1 to 2 tablespoons of white vinegar onto the table. Use another damp cloth to rub the vinegar and salt into the surface of the table.
Rub the salty mixture into the table top with small circular movements. Scrub the entire surface. Do this for several minutes or until the copper is shiny.
Wet a new cloth and wring out the excess water. Wipe the tabletop clean with the cloth to remove all of the salt and vinegar. Continue to rinse the rag and clean the tabletop. Pat the table dry with a clean, dry cloth.