You expect this crowd to buy "professional" glass cleaner when 90% or more of them *****, piss and moan about how much the hobby costs? It's hard talking some of this bunch into not running used lifters on a camshaft, or buying a cam bearing tool, or any other tool or part many people consider necessary parts of the hobby. What a damn joke.
That figures. They'll buy "the best" 20 plus dollar glass cleaner, curb feelers and air fresheners, but dammit to hell something really important.
And a 99 cent bottle of isopropol alcohol will get the job done just as good.