They're good when they don't bend. But all too often, if I accidentally bump it even the slightest bit against another tooth, it immediately bends, and once it bends forget to put it back between your teeth. Squeegee brushes are a much more durable product. They don't massage either, but I use both ends, first with a toothpick to remove plaque and debris, and then the end of the brush to work out the details. And they are MUCH cheaper. I will not buy any gum product again and do not recommend it.
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