Thanks for the response!
Well, I'm also considering coming up with my own product to sell to my detailing clients. I want it to be professional - grade. If it turns out great, I'll package it and offer it to my customers.
I've been thinking of making DIY Windshield washer fluid. I was planning to source some 2-Butoxyethanol and mix it in with a 1% dilution with distilled or demineralised water (whichever I can get my hands on). Do you think that should make a good summer windshield washing fluid or am I missing...