Great review - thanks for sharing! I've never seen such a thorough testing of the products. Good to know that there are options, but I'm going to stick with RainX because it's cheap, easy, and fairly effective. This is what he said about RainX in the conclusions: "If you are trying to make every dollar count and it's about performance and price, the RainX is a clear winner. At a price of $10 for 7 ounces, which is less than half the price of the top three brands, it still performed extremely well." I'll just have to remember to reapply it a little more often than any of the pricier three leaders (Gtechniq, Aquapel, and Gyeon, in that order).
Here are the final scores:
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