Finish the following sentence with the best choice: How to clean a child's school backpack?

Choices:
- After removing the contents use a mix of water and detergent to scrub all surfaces, rinse with cold water and let it dry in the sun
- Before removing the contents use a mix of water and detergent to scrub all surfaces, rinse with boiling water and let it dry in the sun

Answer:
After removing the contents use a mix of water and detergent to scrub all surfaces, rinse with cold water and let it dry in the sun