[vision tech]

 water stains on window
Today at 23:33:13  Alert Moderator  Mark & Quote  Quote  Modify  Remove   Ive just started cleaning shop window for a new custie,the shop was unoccupied for awhile and rain had been running down the window from metal shutter,it has left a stain all over the window and no matter how much i clean it the stains are still there. they want me to clean of the stains, question is what is the best way to do this ?
do i use a scraper or a pot scrubber type sponge, or is there some kind of detergent i can use?

[Chris Galloway]

try MDR (mineral deposit remover)

[vision tech]

do i get that from cleaning suppliers?

[Chris Galloway]

A specially formulated thick liquid for the removal of mineral deposits on glass.
MDR removes water spots, hard water film, oxidation & lime deposits.
MDR is safe to use on glass, alloy, stainless steel and chrome.
Apply with a lightly abrasive white pad or applicator sleeve.
MDR is biodegradable and does not contain harmful hydrochloric acid which can damage the glass and surround.

http://www.cleaningspot.co.uk/acatalog/Unger_and_Ettore_liquid_and_soap.html

and scroll down.

could also try a search, as i think there are other products members have recommended before about this.

[baldeagle]

Is it lime scale?

I've had cases of water running long term from a high level overflow, and splashing the glass when it hit the sill.

A spray on lime scale remover did the trick, except for one, where the lime had etched the glass a bit.

Baldeagle

[john tomkins]

If those dont shift it .... this will...
Winsol Crystal Clear 550
http://www.soapnational.co.uk/cgi-bin/sh000001.pl?REFPAGE=http%3a%2f%2fwww%2esoapnational%2eco%2euk%2f&WD=mdr&SHOP=%20&PN=Chemicals__Cloths%2ehtml%23a268#a268

[s.hughes]

lots of white viniger and a good scraper