How to clean sink stains..(coffee, pop)

The kitchen sink should be one of the cleanest surfaces in our home. Unfortunately, quite often, the kitchen sink is full of germs. After all, the kitchen sink sees a lot of action. We rinse our fruits, vegetables, fish, meat, poultry, and almost anything we can think of in the sink. We drain our pots and pans into the sink. We wash dishes, glasses, and silverware in the sink.
To clean your sink without bleach, wet the sink then sprinkle baking soda over sink to make a paste. Add more water if needed. Wipe the sink, the drain and the stopper. Once all stains are gone, including the coffee and pop stains, rinse sink and wipe dry.