In this video, Josh shows us how to clean dirty pennies with ketchup. You will need, a timer, ketchup, a dirty penny and a penny. First, pour ketchup into your cup or dish. You don't need a lot of ketchup into the cup, just enough to cover the pennies. Next, push the penny into the ketchup so it's fully covered. Now, set your timer for 2 full minutes. When the timer goes off, take your penny out of the ketchup. Place the penny onto a paper towel and wipe it off until all the ketchup is gone. You will now see the penny a lot more shiny and clean than it was before!