Finish the following sentence with the best choice: How can you keep swimming goggles cleaner longer?

Choices:
- Wipe a smear of sulphuric acid on the inside of the goggles, then wipe it off, it will keep them cleaner longer.
- Wipe a smear of toothpaste on the inside of the goggles, then wipe it off, it will keep them cleaner longer.

Answer:
Wipe a smear of toothpaste on the inside of the goggles, then wipe it off, it will keep them cleaner longer.