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Review title: Terrible design that won't stay on your teeth
Product review: This product is poorly designed. The trays are flimsy such that they generally will not stay in place. The gel is meant to be pushed against your teeth so that the trays and gel will always cover the surface of your teeth, but this mechanism does not work. The gel is not adhesive enough to stay in place. You will often find clumps of it come out the edges, forcing you to either swallow it or risk losing the entire tray when trying to spit the gel out. Perhaps the intensity of the gel would work better than that of competitor's white strips, but since the gel rarely stays on, it's impossible to tell. I will go back to strips and stay away from these trays. It was a true waste of money and I regret having tried what I thought would be more like a professional teeth-whitening kit.
