[Shane O Neill]

I have been window cleaning for a bit but in past week I have some customers saying certain windows were strange after last clean in that when it rained it show squeegee line with water running strange off window after rain....anyway today custy showed me pictures of his window & he reckons its from aircraft burning fuel off ....I mention this to nxt custy but his eyebrows showed he was taking this....but it only seems to be west facing windows fine on all others  Anyone else have this problem,I'm in Manchester area cheers

[andyM]

Could it be from Chemtrails? 

[colin purewater]

Lol your just rubbish 

[A & J Owen Window Cleaning]

its more like  the glass has got used to the pure water you use I assume its wfp you use. some glass is coated with a solvent cleaner when installed so the rain water runs off in sheets not rivers.you know the hydrophilic and hydrophobic scenario. is this what you mean

[bumper]

I notice doing inside windows  with nicotine on them couple days later you can see all the squeegee marks on windows inside,for outside it could be to much soap on pad or its drying to quick then you blade drags

[home6442]

I had something like this on a few houses that I do.
Im wfp and the glass was coming up with what looked like small grease marks
as I applied the water.
Took a lot of hard scrubbing to remove it.
Ended up washing them by hand with a wet microfiber my mop wouldn't lift it.
It showed up well for me as I was using water but might be harder to spot using
a trad solution.
Couldn't figure out what it was and it was only in this small area.

[rg1]

I had something like this on a few houses that I do.
Im wfp and the glass was coming up with what looked like small grease marks
as I applied the water.
Took a lot of hard scrubbing to remove it.
Ended up washing them by hand with a wet microfiber my mop wouldn't lift it.
It showed up well for me as I was using water but might be harder to spot using
a trad solution.
Couldn't figure out what it was and it was only in this small area.

Slug or Snail trails?

[Shane O Neill]

its more like  the glass has got used to the pure water you use I assume its wfp you use. some glass is coated with a solvent cleaner when installed so the rain water runs off in sheets not rivers.you know the hydrophilic and hydrophobic scenario. is this what you mean

No I trad ground floor windows & it's only on certain windows as if there is grease on glass like as I said 1 custy thinks it fell from aircraft,same window sills have brown spots on them.....ah well never mind must just be my area (r as Colin suggested I'm rubbish,but then mate I'd be rubbish at all windows  )
I can see this is going to be a tough forum  must be careful of who I comment against......who r the mutters on here to be careful of   

[Bay View WCS]

Just explain that you've a mate in the CIA who had a chat with a buddy in the FBI who has a cousin that has a hotline to someone really high up in the illuminati and they confirmed that since the 9/11 cover up they have been trying to find a way of distracting us from crop circles being landing pads for the lizard people who live among us (Dazmond?) so they have been working with the aliens to add morphine to the chemtrails to put us all to sleep but that also means the glass is harder to clean - so that also means bungin the price up 2 quid to cover the extra time. Simples

[G Griffin]

Barbecue grease?

[rosskesava]

I reckon it's a doley or an undercutter with a can of wd40.

[home6442]

There are guys who go about selling spider repellent.
They spray it around the frames but it also goes over the glass.
It can be a right pain to remove from the glass especially if its been on
a few days.
But you would see it before you started to clean.

[elite mike]

Barbecue grease?

+1

[Ian Lancaster]

In my experience barbecue grease is a splatter pattern, rather than lines.  The brown spots on the sills suggest spider s**t - could the lines be spider web residue? If you squash a spider web against the glass, the adhesive sticks along the line of the web filament and it can be a pain to get off.

I also had a row of jobs alonside a railway line and their sills were covered with brown spots from the minute particles of steel from the train wheels - these rusted and left immovable brown stains in the plastic.

[ascjim]

aircraft burning fuel off .