While the overly simplistic capitalist view I expressed may seem naive it would also be naive to assume that there is such a solution.  While there are exceptions to every rule it is generally a good assumption that price and performance will diverge.  Unless the answer is exceedingly simple and cheap you will be at a competitive disadvantage if only because you have research and development expenses to cover in the sale of your product.

Debate of market economics aside (as this is not the place), I still feel the last sentence is either not very encyclopedic (lack of supporting research or citation) or not clearly conveying its message and therefore should be removed.  I would gladly cede this argument in the face of evidence that such a product existed, but a quick search for such research did not reveal any.  A common environmentally friendly alternative to washer fluid frequently quoted is to use vinegar and water, but seeing as how acetic acid, the main component of vinegar, freezes at 16.5°C I do not think it would be effective in cold climates.  Maybe there is an acceptable middle ground?