A few months ago I started a high end car detailing business, because I love clean cars just as much as I love dogs. But just as I research products for my dogs, I do the same for my cars. Especially for my high end car customers. So before I use any products on one of my customer’s, Porsche, Tesla, Jetta, etc. I needed to be sure I’m using the best product available. To tell you the truth, I really wasn’t too concerned about what window cleaner I used, until I started testing them. I tried everything from the top brands, like Windex, down to the cheapest no name products and they all seemed to leave more steaks and smudges than the E. Logical VOC FREE Concentrate. But out of all of the products I tested, the “E. Logical VOC free concentrate” was hands down the best and most economical product I tested. Even if the VOC Free was the most expensive cleaner (BUT IT WASN’T), I would continue to use it over the brand name cleaners or the cheap stuff. It does an AWESOME job cleaning and it’s always streak free!!! It is the best at getting bugs, grease and road grime off the windshield. The mirrors and glass are left streak free with less effort and less time involved due to the fast drying nature of this product. This VOC Free cleaner makes it much easier to clean glass, mirrors and hard shinny surfaces, I found it to be the best cleaner out of the four brands I tried. Sincerely, Mr. Clean Auto Detailing