This is a test of commonsense. Complete the next sentence:

How to clean your dog's toothbrush
Use a separate toothbrush for each dog.
After brushing your dog's teeth, rinse the toothbrush under warm water. Remove any toothpaste, food particles, and debris from the toothbrush with your thumb.
You can also use a toothpick to remove smaller particles. Rinse the toothbrush after each use.