Is the difference worth it? I have tinted windows, FWIW.

 

I haven't seen any major difference as long as you buff it all out. You can tell when your rag will slide freely down the window.

 

Food for though, that Stoners glass cleaner is the best stuff I have used.

 

As mentioned above I have heard that the Stoners glass cleaner is good. You can just do a Google search for it and find their website. However, I have known Windex, or any glass cleaner that contains Ammonia, to turn your window tint purple over time.

 

Thats what the tint guy told me.

 

Yea, stay away from ammonia when you have tinted windows. I personally use newspaper and Stoners and am VERY happy with the results. I won't buy anything else now (although I've heard 20/20 is really good as well).