the method I was shown years ago was to put a spot of vinegar in a bucket of tepid water. Use a sponge to wash the glass, wipe with a chamois leather and finish with a sheet of screwed up newspaper. This leaves a streak free finish. Don't wet the sponge too much or the water will run everywhere.

I just use my wife's 'Mr muscle' window stuff..works fine.
I have used dilute vinegar then polish with old newspaper before but the smell is off-putting albeit the results are great.
For really dirty house windows my best results are with sugar soap solution rinsed off with clean water using a decorators cloth.

pgk

My wife swears by Nilglass…

I just use warm water and splash of washing up liquid and clean off with newspaper, cleans my mirrors and windows

Mick

Astonish or Simoniz Glass cleaner . With a Micro Fibre Cloth Or a Paper Towel , T he best i found to date

Regards Bee.M

The inside of the windscreen and other windows can get covered by a film of condensed plasticiser which leaches from the dashboard in very hot weather and to which air-borne dirt particles adhere. It is usually transparent and unnoticed until water vapour condenses on it, turning it opaque and so difficult to see through, especially when the low sun is directly ahead.

I have had some success with various solutions to try to shift it, ranging from vinegar,etc. as mentioned above and including methylated spirits, cellulose thinners & ethyl alcohol – all with the car doors opened, of course!

There has been no easy way to rid the screen of this tenacious layer – everything I have tried needed a lot of elbow grease to make an impression. The thing is, it is not oily or greasy, but I suspect is deposited plasticiser and so may need a very specialised chemical to shift it – such as the polish they used on the Apollo rocket nose cone ?

Good luck with your endeavour and more power to your elbow(s).

Edited By brian roberts 2 on 15/10/2021 18:55:59

I blame the deposited film on the cars ventilation system drawing in road fumes which have microscopic particles of oil and rubber from the cars travelling in front which then adhere to the glass, and yes the bottom of the windscreen must be one of the most difficult areas to reach without dislocating something very painful. Dave W

The Rumanian guys at our local car wash do a brilliant job, inside & out. Fast as well.

I have not cleaned my own car myself for years.

Now my boat!– that is a different story– shines like the proverbial shilling up — well you know what I mean

I always assumed it was people-cr@p on the screen – since driver and passengers face forwards and breath and then general airflow, condensation etc evening the deposit out. It’s more obvious on a 'puter screen where one sits closer and droplets form?
Perhaps someone would fancy doing half the screen with typical cleaners and half with a biological soap?

pgk

Autoglym Fast Glass for me, not cheap, but a little goes a long way

Slightly soapy water, a good, clean microfibre cloth and kitchen roll to dry.

It works for me, but do keep the water & cloth clean to prevent the dirt going back onto the glass.

Martin.

Edited By blowlamp on 16/10/2021 13:07:57