How do I use The Dirt's Toothpowder? Support August 11, 2015 21:46 Follow Wet your toothbrush and tap off excess water. Dip in your jar of toothpowder and swirl around. Tap brush on side of jar to get rid of extra powder. Brush as normal! No need to be rough, this stuff really works well! Related articles Do I use The Dirt toothpowder in addition to, or instead of toothpaste? How long will a jar of The Dirt's Toothpowder last? Comments 0 comments Article is closed for comments.