Strange marks on window, driving me mad.

[laurend]

Hi everyone, I have a problem and I'm hoping you can help me out.

I've been cleaning a house wfp every 6 weeks for the last 3 years and there is a rear upstairs window that always has marks on it once the water dries, it's the only window it happens to and I can't work out why.

I've paid extra attention to the rinse and even been up on the ladder to check it's clean before I leave.

Within a hour or so the guy( really understanding) texts to let me know the marks are back!

Any ideas would be appreciated as I think the customer will lose patience eventually.

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[Dave B]

Have you tried magic sponging the area that marks?

I had a window like that and it was obviously something on the glass as i magic sponged it thoroughly and they never came back

 

[laurend]

I've not tried magic sponge.

Funny thing is they seem to go but return later.

Where do you get magic sponges?

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[spruce]

I've not tried magic sponge.Funny thing is they seem to go but return later.

Where do you get magic sponges?

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If you Google "magic sponges" you will find suppliers and other info that will assist you to widen your search.

 

[spruce]

We have several customers where they have extremely hydrophobic glass that has been 'damaged' by cement residue. On one of our customers houses it appeared on recently fitted windows after the walls were re-grouted. The walls were re-grouted after the windows fitted. It has etched into the glass and leaves tiny white round marks. We haven't been able to remove it with chemical means.

The next solution is to abrasive clean them but that's out of the realm of my skills and remit of window cleaning.

.

 

[Aqua-pure Portadown]

it could be hard water staining or limeburn (cement stains glass when bouncing up off cills)

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[Tuffers]

it could be hard water staining or limeburn (cement stains glass when bouncing up off cills)
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That was my first thought. Is there a toilet overflow pipe near the affected window @laurend?

 

[luca]

Hi everyone, I have a problem and I'm hoping you can help me out.
I've been cleaning a house wfp every 6 weeks for the last 3 years and there is a rear upstairs window that always has marks on it once the water dries, it's the only window it happens to and I can't work out why.

I've paid extra attention to the rinse and even been up on the ladder to check it's clean before I leave.

Within a hour or so the guy( really understanding) texts to let me know the marks are back!

Any ideas would be appreciated as I think the customer will lose patience eventually.

Sent using the Window Cleaning Forums mobile app

Silly question maybe and one you'd probably of encountered but are they UPVC or wooden... I had similar issue with just one window too some time ago...

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