"Commander Kinsey" wrote in message
newsp.0l5krbo2wdg98l@glass...
On Sat, 13 Jun 2020 00:24:25 +0100, Rod Speed
wrote:

"Commander Kinsey" wrote in message
newsp.0l4fm1d0wdg98l@glass...
On Fri, 12 Jun 2020 22:48:38 +0100, Rod Speed
wrote:

Commander Kinsey wrote

Why are skyscraper windows cleaned?

Because they get dirty quite quickly.

Not on a soggy island.

Yep, because the rain is quite dirty where the sky scrapers are.

Can't they just have jets of water at the top that flush the whole thing
once a week?

Doesn't work either because to get the worst of the dirty
off you need more than water running over the glass.

They could even have a wash and rinse cycle with detergent in it.

Still wouldn't work as well as the current window cleaning does.

Surely the rain does that job for free?

Nope.

Water tends to wash things off.

But adds more dirt when its dirty rain,
as it is where the sky scrapers are.

Flying into sydney on a clear sunny
day, the smog is very clearly visible.

I didn't think you had enough population density for smog.

The bigger state capitals do.

I have never cleaned my house windows,

Hovels don't count.

Doesn't make a difference to what glass does in rain.

Yes it does.

Then why not use hovel glass in skyscrapers?

They do.

it can't be dirtier higher up.

It is actually.

For what reason?

Higher wind speed with the dirt in it.

And higher wind speed with the rain on it to rinse.

Doesn't work like that.