How to clean inside windows without leaving any water residual behind that causes glare?

use Stoners glass/window cleaner

2nd that. Stoners makes great products

Adam's Glass Cleaner is the best I've used, better than Stoner's imo (though name not as cool)

I use windex very sparingly, and MF towel, no issues for me.

3rd. Stoners with a DD glass towel works great.

newspaper works well....old trick
 

just use a section that doesn't have a ton of ink. just ball up a few pages and wipe down the windows. i've tried spraying stoner's first, then using newspaper and it works.

2nd..been using it for years.

Does more newspaper ink = better?
 

It seems to make the windows more sparkling clean.

4th!