I’m about to change your life man. I have been detailing professionally for 15 years and I always hated doing windows. This is the solution:
buy this glass cleaner. It’s super cheap and it is the absolute best glass cleaner I have ever used - bar none (It’s not mine - I’m not plugging myself or anything). It’s a gel, not a liquid so it spreads more evenly over the whole surface much better. And a secondary benefit, is that you can use it on hot days because it doesn’t dry so quickly. I live in SC and I have used this stuff on black windows on a 110° day and it worked like magic.
Use this with a ‘waffle weave’ style microfiber towel and never see streaks again. Another tip is to wrap your microfiber towel around a paint mixing stick, and run it through the creases on the windshield and windows.
As far as ‘waxing’ your windows goes, I have found success with
Meguiar’s Hi-tech Yellow Wax, but the best glass sealer I’ve ever used is
this it keeps glass hydrophobic for months. Hope this helps! Good luck on keeping those windows shiny and streak-free!!
Luke