Quote:
Originally Posted by scubajim
If after cleaning, it's still streaking then there is still residue on the windshield. Keep going at it with the alcohol and a fresh towel each time. I have an optical shop and patients come in and complain their coatings are defective because the lenses are streaked. It's actually oils or debris in the frame edge that is smearing across the lens. We take it apart and clean everything or run it thru the ultrasonic cleaner. Now if the lens is damaged or in your case there is a physical defect in the glass, I understand but the streaks in your glass would always be in the same location. Dry buffing after multiple cleanings is the trick in my opinion.
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Worked in optics (eye glasses) for years.
We used Dawn liquid dish soap in a tray with some water. Put the eye glasses lenses down submerged in the very soapy water -- submerged enough the nose pads were submerged -- resting not on the tray bottom but on a clean towel laid down and covered by the soapy wat4er -- then after a bit remove rinse under hot running water. Dry with a *clean* towel.
There was a sonic cleaner too. But most glasses -- way back when -- were fitted with glass lenses and soapy water, clean rinse water, toweling off worked very well. I left the business just as plastic lenses started to make significant inroads.
Anyhow, to clean auto glass -- inside and out -- I rely upon Windex then a wipe down with a clean soft cloth towel. I repeat until no more streaks. I start out with a stack of clean towels.
After all the cleaning is over with the towels go into the wash with some laundry soap and bleach. Then the dryer. No dryer sheets.
Back on the auto glass: It helps to have the car facing a low sun -- but not a hot sun -- to better see any streaking or missed areas, etc.
Cleaning the inside glass especially the windshield and rear window are my least favorite tasks in keeping my cars nice.