To be honest I was delighted with this product. As someone who just got their glasses and quickly realizes how often they get fingerprints, this seemed like the perfect way to keep them clean. When I received the product it was easy to use but I didn't notice any difference in purity. I checked both my glasses and some of my mother's jewelry, but none of them seemed different. I've seen it's great for other things, but it doesn't really work for what I need it for. Great value if you can find a way to use it.
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