I had applied Rain-X 2-in-1 Glass cleaner+Water Repellent in my car windshield earlier which was causing chattering wipers and streaks (leading to poor visibility) when it rained. The other problem I had was the hardened water spots in my windshield and windows because of car washes.
I tried Rain-X Xtreme clean (white colored glass polish)to remove the Rain-X water repellent and water spots. I partially succeeded. I don't see the water beading anymore and wipers have stopped chattering. 50% of the water spots vanished. However, when it rains, the head lights from the opposite car looks blurred through the windshield and still it causes little streaks when the wiper blades wipe the rain on the windshield. Also, I notice an oil like film (with a prism effect showing rainbow colors) whenever I wipe the windshield or glass.
Then, I tried Sprayway glass cleaner (alcohol based glass cleaner) as suggested in one of the threads. It has 5-star reviews on Amazon - http://www.amazon.com/Sprayway-Glass.../dp/B000AP585M. I applied it on my windshield and all the windows (exterior) which made the problem worse. The windows get awfully blurred when it rains (even during daytime) which makes it difficult when I make the turns.
It's a 2011 Corolla.
Can someone suggest me a solution for this problem?