Review (5/5): It works and is not messy if you follow directions!
I am a firm believer in alternative medicine and non-toxic, organic cleaning substances; this is one of the reasons I was intrigued by this product. I'd already been aware of the benefits of activated charcoal for other uses, so why not use it to remove toxins in the mouth? I'd read many of the positive and encouraging Amazon reviews before purchasing it from my local health food store, and do not regret this purchase for one moment. Even though I've only used it twice, thus far, my teeth already look a bit whiter and feel cleaner than with any other product I've ever used. I was initially concerned about the "messiness", but there are specific directions provided to minimize the mess. A scoop is provided for those such as I, who prefer not to dip a wet brush into the container, but there's a better option. I have a set of small-increment measuring spoons (pinch, hint, dash, smidgeon), one which scoops out the perfect amount to sprinkle onto a wet toothbrush. This worked perfectly the first time I used it with no spills in the sink. You only need a tiny amount. I then "followed the directions" and kept my lips closed while brushing for the maximum two-minutes and keeping my mouth close to the sink drain. The directions also state to NOT "spit" it out, but rather allow it to fall out of your mouth, and use your hand to transfer running water to your mouth for rinsing. The small amount of charcoal residue left in the sink cleans up quickly and easily. So if you use a small enough amount, stay close to the drain, keep your lips closed, and refrain from spitting, this should be a pleasant and satisfying experience. So far, I highly recommend it!