Luckily, I remembered that there were certain fruits that actually do help whiten your teeth, and they happened to be ones that Cornelius and I have been using for our fruit smoothies.
The first are, of course, strawberries. One way to whiten your teeth is to crush a strawberry and combine it with baking soda. Just apply it with a toothbrush, and leave the mixture on for five minutes. Take it off by brushing your teeth again, and that's it! You can do this once a week, but don't overdo it. The baking soda could eventually damage the enamel on your teeth.
I've also heard that eating fruits like apples after meals can also help to remove surface stains, because they remove food particles that are left on the teeth from eating.
How do you keep your pearly whites sparkling?