Hi Mike,
Out of interest what product do you use to get the limescale off the windows, and how do you go about using it.
Cheers
Doug
Doug,
Thanks for asking about the limescale.
In this particular case, the problem is that bad it has even dripped on me while cleaning the glass. And because it is so bad, I'm doing the glass monthly at the least, sometimes weekly (the guy paid $3,000,000 for the unit so he can afford it).
So what I have been using is a product called "Evergreen Total Washroom" (see below) and it's sold by Elite Chemicals (
http://www.elitechemicals.com.au) down here in Australia
"Evergreen Total Washroom Maintenance Cleaner
Designed to cut through body fat and scum build-up on shower floors and walls, cleans toilets, urinals, baths, sinks, tiles and hard surfaces."
I dilute it in a spray bottle about 1:5 to 1:10 ish. Then I spray it on the area that needs treating and gently scour it off with one of those kitchen scourers with the green scourer on one side and the sponge on the other. I know you shouldn't use plastic scourers on glass, but I find it works well and I keep the pressure light. (Depending on the wind I'll also spray it onto the scourer itself and then scour the effected area.)
I had used a scraper (the Unger brand that comes in the plastic box with ten or so spare blades). But it was tough going doing it that way so I switched to the sprayed on chemical.
I think, if the glass would be left for 6 months or so and then done, the glass would have etchings in it that couldn't be removed. There is already one pane that when you look at the right angle you can see where it is leaving a mark on the glass that can't be got rid of. But when you look through the glass like most people do, and not at the glass like window cleaners do, you don't notice it.
I've been doing that glass since the building was built so I've been able to stay on top of it.
But when sprayed on shower recessess that have begun to get that "fog", it will remove all usual scum stuff, but the visible water stains are there to stay - even when used undiluted.
Another thing about those stains that sometimes happens, it can depend on what the water is going through first. Is there an insect screen with aluminium and is the water taking parts of the anodised aluminium onto the glass? What chemical is the govt putting in the water and what is that doing to the glass?
I don't use any fancy window cleaning solution in my bucket, just biodegradable dishwashing liquid from the supermarket.
Possibly, and this just occured to me, true limescale as I deal with in the photo, is lime in rainwater. Where as other "stains" are usually from tap water. So I'd say there is something else in the tap water doing damage as well.
I have heard such stains can be got rid of by applying some limescale remover and scouring with No 1 size steel wool. I've not tried it though.
Michael Ross