Finish the following sentence with the best choice: How can I use toothpaste to clean my shoes?

Choices:
- Place toothpaste on cleanest parts of shoes and scrub with a old toothbrush.
- Place toothpaste on dirtiest parts of shoes and scrub with a old toothbrush.

Answer:
Place toothpaste on dirtiest parts of shoes and scrub with a old toothbrush.