The Best Glass Cleaner?

[Winchester30]

Had some Rain-X on hand that I got at christmas so I gave it a try yesterday. I followed the instructions and was not blown away with the results initially. Buffing with a dry cloth did not get the product off the windows to my liking so I ended up spraying water on them and drying with a microfiber. The water beaded nicely when I sprayed them so I'll wait a while to pass judgement and will treat the windows one more time in the future.

RainX on the windshield increases headlight glare at night.
Only use on side and rear windows.

 

[rschap1]

I have never had that issue...
Use it on the windshield(s) all the time.

 

[Hagasan41]

Just tried this on all the glass. Initial thoughts are good user experience, easy wipe on and off. Leaves the glass streak free and super slick and has a nice scent. Longevity will be determined as well as preventing wiper chatter.