Well, it works. I guess that's all you need to know. Granted, the directions tell you to clean whatever area you plan on applying it to, and that's not always feasible. However, the area doesn't need to be super clean. I use it under my arms. I don't shave under my arms, so it's a little tough to apply, but it still works pretty well. I can use a small amount of this instead of deodorant. There's no residue left on your shirt. It stops the sweating, and therefore stops the smell.
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Change how it comes out of the bottle. After using it, a small amount is left in the tip of the nozzle and dries up, which leads to waste. The directions say to wash and dry area thoroughly before use, and that's not always feasible, especially in the mornings.