On a heavy rainy day I don't mind getting behind a truck and trailer on the highway, being bombarded by rain and watching the rain beading and zooming off the windshield WITHOUT the wipers on. I use to use Rain Vision, the BEST I've found, but it seems they've gone out of business. I won't use Rain-X as it leaves a fog film on the windshield in rain and humidity conditions. Over the years I've tried some other products, all completely useless, Castrol Super Clean Accuvision, Glass Shield.and I've never tried car polish or car wax. Should I? For cleaning prior to using these I use Windex or such, followed by No Streak Glass Polish, the Best I've found, trying to use up Storer Invisible Glass. What product have you found as a rain repellent that works!