[dparm]

What are the symptoms of "window creaks"? Is this the weird high-pitched but faint groaning noise you sometimes hear? If so, I get it at low speed, especially while turning or changing direction.

If that is indeed what's happening, then yes, those waxes would work. My S2000 had to occasionally get the rubber gaskets waxed along the top of the window. They had a particularly good branded grease/wax you could try -- it was called Shin Etsu silicone. I also have the Einszett rubber/gasket treatment if you want to borrow it. I only use it on the door, trunk, and hood gaskets but I had never thought to try it on the windows.