Before the flames erupt, let me reveal, over 40 years I have tried everything to clean the windows of the Porsches and other cars I have owned. I have gone from every commercial auto-specialty formula (Griot's et al), to window glass cleaner (Windex et al) to products that windshield-replacement folks supply (Safelite auto glass cleaner), to chemical combinations (30% acetic acid, 70% water), and finally, water itself. Few do well on the outside and none do well on the inside. My cars are immaculate since I know how to detail but the windows are too cloudy to see out of even after I wash and detail. I need some kind advice with no flames. What do you use to clean your auto-glass perfectly, inside and out? I would appreciate the advice.

In return, let me reveal that I have a perfect, cheap solution for cleaning wheels. I have used Windex on my wheels for 30 years. When you spray them, stand back and watch the brake dust cruise off and then spray it with water. If you are as compulsive as me, steal some paper towels from your wife and gently wipe the wheels. My wheels are immaculate weekly. When I drive this garage queen a few times a week she never fails to generate a thumbs-up or an hour conversation. Please let me know when you have a window solution.

 

Sprayway and paper towels for me.

 

and water. They are amazing. The only thing is, you need to pay attention to the prices on Amazon. Sometimes a pack of 24 goes for ~$33, sometimes they go for ~$65. However, they are THE BEST thing for cleaning glass.

 

I still have three cans of Spray Away in my cabinet. They have not moved since picking up some "Invisible Glass" that my neighbor recommended. I found it at Walmart.

 

I have used the windex on the wheels, and can attest that it does work

As for glass, this works for me - wet a Mr. Clean Magic Eraser and then spray your favorite window cleaner spray on it (I use Stoner). Clean your glass with Mr Eraser and then squeegee off.

Another thing you can do clay your glass first.

 

The microfiber towels mentioned above from Amazon look like these from Detailers Domain: https://www.detailersdomain.com/coll...-company-glass
I also have really good luck with these: https://www.microfibertech.com/micro...gsm-12x16.html

For glass spray I use Adams glass cleaner. The Invisible Glass products have worked well for me, too. I also use the same products to clean my touch screen on my GTI (no 911 yet!) and all of the piano black trim pieces.

 

Shade.
Glass is cool.
Only use dedicated window towels, never washed with fabric softener. I have 100% white terry cloth towels bought about 14 years ago at Target.
Wear rubber gloves to get a better grip on towels.

Make your own window cleaner in a spray bottle:

1 part denatured alcohol (Home Depot-paint section)
2 parts distilled water

Process:

Wet towel well.
Wash glass.
Buff dry with 2nd towel.

Another tip:

Our interior windshield is very large, so do it in 4 seperate mental sections.

Final note:

Every time you detail your interior (leather and plastic) with conditioners and such, you re-start the gasing out process, and that's what collects as haze on your interior glass.

 

As LexVan said, I believe the secret to clean car windows is TOWELS, not the mythical "perfect" cleaning solution.
First, never wash ANY of your car towels in fabric softener.
When cleaning windows - make sure the windows are not hot - clean the windows using one towel for the spray solution (I use Invisible Glass - buy it at Amazon), THEN use a clean, dry towel or micro fiber cloth to POLISH the window after cleaning, which should remove all streaks. Change your "window cleaning" towel often.
Then, when you park the car back in the garage, crack the windows an inch because Porsche interiors continue to "gas" (give off fumes) for years. Those fumes coat the inside of your windows and make them look hazy and dirty.

 

Invisible glass and microfiber towel...no problems even with all windows tinted

 

I agree with the others that say it is all about the towels. I have waffle towels in my detailing kit just for glass, combined with Invisible Glass they do a great job.

 

I use this with Scotts window paper towels. I think it does a better job than Stoner.

 

 

My Dad, an old time hot-rodder, swears by B&W print newspaper, which seemed to work well when I see him use it on his '56 Chevy. For me I use diluted ZEP glass cleaner concentrate on a microfiber and dried with it flipped over, and when done I follow with a different clean/dry micofiber to buff off any residue

 

I just use a polish... like Nufinish on the inside and outside of the windows. It makes the window surface nice and smooth... water beads off on the outside and it takes much longer for a layer of gunk to accumulate on the inside. My brother uses #0000 steel wool and swears by it. Says it get off all water marks, etc. and leaves a really smooth surface.