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We have a private manufacturing company. We spray a low pH then a high pH through arches in the tunnel. We've tried a bunch of the "big" guys but always gone back to our own formulations. The current generation worked incredibly well until three months ago, when we got rain. We are located in...

Help! I've got 6 carwashes with filmy sides. Brushless, low pH/ high pH system, water is hot and water is soft. Rinsing with hot soft water. I've had chemists and soap salesmen trying to fix the problem (it is a NEW problem) and still getting what appears to be a hydrocarbon film. Has any...