[Nathanael Jones]

What type of window do you find spots the most? Forget other runs/smears etc etc,... its just spotting I want to find out about!

I might have an idea that might help,..... if beading glass is the main culprit!

[Sir Squeaky]

Spots I suppose would be with beading glass, but I don't get them.

What I do get it are "areas" where it hasn't dried clear on sheeting glass.

You might not see it at first, hence why some people on here think sheeting is better, but it's more common than spots on beading windows.

The only advantage with sheeting is it doesn't look so bad for the customer when it's wet.
They can still see out, sort of!

[geefree]

to be honest , i prefer beading water on the glass., ... as when it sheets, i tend to spend ages looking for an odd bit from the brush, and end up going up and down until its bit free....

with beaded it takes that worry away as , well, you simply cant see anything.... so no complaints up to now so  i am happy and i wish they were all beaded.

[Sir Squeaky]

"spot" on Gazza.

Sheeting windows always have bits in the water.

[geefree]

i have one of each at my own house... sheeting and beading....

they both dry exactly the same.... spot free....

i think , its pure water... sheeting water leaves a thick layer of water to dry out.

beading water leaves a lot of little bits of thick water to dry out...

same i think, oh and its pure water so it should dry clear.

personally i think, its the duff seals that cause spotting, or not rinsing well enough,

after all this method was introduced as the future of window cleaning, so in a perfect world it should be brilliant,

pure water dries clear.

so its either seals or dirt not rinsed properly.

[Davew]

Beading windows are sheet! Never quite sure how much to rinse or if the dirt is indeed rinsing away. 

[gary999]

must admit find windows that sheet easier to deal with quicker to rinse
im always paranoid about beading glass, i think i must have missed something
as the water doesnt flow down over the glass evenly so i rinse more

[geefree]

Beading windows are sheet! Never quite sure how much to rinse or if the dirt is indeed rinsing away.

breading windows are sheet? they all dry the same.. its pure water .

[Davew]

Yep they all dry the same but you rely on the water to carry the dirt away, so I'm never convinced a beading window will be ok. They normally are though.

[M & C Window Cleaning]

On my own home the spotting seems to be related to cleaning the frames, as whenever I get my prush on the frames I get some spotting at the top of the window when dry. However if I carefully avoid going onto the upper frame they dry perfect. My frames are white alluminium and are in perfect condition (still glossy, no chalkiness) and I've been doing them six months wfp.

[Nathanael Jones]

I've an idea that might stop the windows that bead,... well beading really. Its early days yet,.. but my thinking would be that if the beads of water are either a lot smaller, less of them, or even gone all together,.. then there would be nothing left to cause the spots when it dries out???

It would involve adding a chemical to the water,... a very small amount hopefully,.. but I know already that there will be many doubters who don't want to "contaminate" water that they've put so much effort into purifying.
I've a few different chemicals to try,.. to see if any of them are half as effective as I'd like, and i'll be looking for something that will lower the freezing point of the water too,.. so hopefully it will be a dual purpose solution.

[ronnie paton]

iv heard of someone putting gg4 in it b4 think they said it may of worked.

does seem pointless in purifying the water though!

[Davew]

I come from a printing background where isoproponol usually called alcohol is added in the lithographic process to make water "wetter". The alcohol breaks down the surface tension of the water to produce a bigger flatter bead of water meaning that less water is required to dampen a printing plate. Havn't a clue if it would work on glass though, even if it did it would hardly be cheap or environmentally healthy.

[Count Phil]

And the alcohol should evaporate like the water! Oooh.

Beading is better - more water leaves the window and takes the bits with it.

[Sir Squeaky]

And the alcohol should evaporate like the water! Oooh.

Beading is better - more water leaves the window and takes the bits with it.

Glad someone agrees with me.

That's a better description than I gave.
I does rinse off much more than a sheet doesn't it?

[Count Phil]

Yeah. When a window sheets, all the water is still on the window. More possibility for spots, when it beads it streams off, infact, most of the the time before you rinse a beading window there's hardly any water on it. You actually seem to put more water droplets on when you rinse - which you know is clean.

[gary999]

call it paranoia but still feel windows rinse better when they sheet to me they
dry more evenly and there is less water on window when i leave must be just me

[Jeff Brimble]

On a free sheeting window gravity pulls/flows all the dirt off the glass, beads remain with the potential to dry into a small round spot of impurities.