meh, windex and a microfiber cloth and wipe clean with black and white newspaper. Only thing I've found that works, especially inside.

 

From an expert:

 

My wife bought the same thing at some party. Like a Tupperware party but with other stuff. That Norwex thing is the best damn thing I've used on windows. Thought my wife was crazy when she told me to try it. Nope.

 

You guys are over thinking this and working way too hard. This stuff is the best. It's cheap. And just about every retail store of any type carries it.
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That's a matter of opinion. I bought 3 of the Ultimate Cloths years ago and their still in great shape. All you add to these if just enough water to get
them damp. Getting a good clean windshield has been a problem for many
forever, especially the inside.

I would think I had it clean after detailing my vehicle until I backed
out in the sun and saw streaks galore. I gave around 5.00 apiece for
them and it's been well worth it. If my windshield is covered up in bugs
I'll use a microfiber to get most of the nasty stuff off and then use
this cloth for the crystal clear look. Looks like lots of ideas on here, I
just know these work for me.

 

Yep. My opinion. The stuff works for me. Whatever works for others is cool. My post was a meant in a light hearted spirit. Happy inside of the windshield cleaning

 

I am not having to "scrub" anything off of my windows. I get that haze build up from the vinyl dash (I have heard that is what causes it) and I simply use a dry Microfiber towel and wipe it clean. No streaks, nada. Just my approach, been using it for years on various vehicles.