What is your response to this

You can literally Google or YouTube a way to DIY anything you want, it’s not like you’d be giving away a trade secret. Most of us pretty much have a standard way of removing most HW stains and a more involved method for the serious ones. I have even gone as far as giving a few of my customers a 3M pad and partial can of Sorbo to keep the stains off between cleanings along with a short lesson. It’s like the question you get asked a 100 times a year, “what do you put in your water get the windows so clean?” and my standard answer is “It really has nothing to do with what’s in the water, I always use good squeegee and 25 years worth of experience.” No trade secret there and they aren’t interested in cleaning their own windows any way.

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:+1: