We know what you’re thinking: Who knew toothpaste was so versatile? Anyway, just use a little less than a pea-sized amount and scrub very gently with an old toothbrush. After a thorough rinse, it should look as good as new.
With a bowl of warm water and about half a teaspoon of shampoo, your brush will be ready for its bath. Dunk the brush into the bowl and leave it submerged (except for wooden brushes—only submerge the head) for round five minutes. Give it a good rinse and it’ll be good to go.