Summarize this article:

Toothpaste should already be a standard part of your medicine cabinet and morning routine. Designed to be abrasive, toothpaste can fix a plastic scratch the same way it cleans teeth. Because it is home-based and shouldn't require additional purchases, toothpaste is the recommended remedy for fixing plastic scratches. It's important to make sure the toothpaste is an actual paste, as opposed to a gel-based toothpaste. In order for the scratch to work, the toothpaste needs to be abrasive. Check your toothpaste box if you're unsure about the kind of toothpaste you are using. A baking soda mixture has the same abrasive qualities as toothpaste. If you'd rather use baking soda, you can stir up a paste and use it in the same manner.
Have toothpaste at the ready.