Tried working yesterday morn but the first window I cleaned turned straight into Ice. That was it and off home. Later that afternoon while I was off to pick up my grand daughter from school I came across a cleaner who said he had been out all day and it wasnt a problem because he had a hot water system. Do these hot water systems do the business like he said ?. I was also wondering that if certain rooms in a house for eg. a spare bedroom or unused conservatory during winter that arent heated internally will they freeze quicker than warmed heated rooms , if so then its nearly certain that some windows will ice over quicker, how do you explain to customers to convince them,,,,, or do most of you just leave cleaning until the weather changes