Task: clean coins
Assumptions:
Clean coins with baking soda.
Steps:
Place the coins in a bowl.
Add warm water and baking soda in the bowl.
Stir the baking soda mixture until it coats all of the coins.
let the coins sit for an hour or more.
Remove the coins from the baking soda solution.
Use a toothbrush to scrub them.
Pour warm water over the coins to remove any leftover baking soda.
pat all of the clean coins dry with a paper towel.