Yep, they definitely stay cleaner longer, but that also does depend on weather conditions to a degree.
Educate your customers, your regular maintenance cleans are done to KEEP them clean, the idea is that your windows are clean all the time, you don't just wait until they are covered in grime to clean them.
I'm just about to go back out to work, but I've also just had a text off Squeaky, he has just had 2 customers ask him to to call every other month instead of every month...what's the betting this is for exactly that reason?
I'm sure he's gritting his teeth in frustration, too late now, but if he could have said, "Ok' but I'll have to put up your prices to compensate as through the winter your windows are now going to be harder work to clean."
it might have given him a little satisfaction, but he isn't overrun with work at the moment, so no doubt doesn't feel able to take that line with customers just in case they completely cancel on him.
difficult to move the goalposts with old customers, but you can put this kind of thing in place with new ones.
You can also of course tell them that 4 weekly = £xxx, 8 weekly = £yyyy and 12 weekly = £zzz
I have one shop in particular that really shows the difference between trad and WFP.
When cleaned with either method they are spotless, but when done trad, because of the position of neighbouring shops, on one corner the wind always forms a vortex, the air always swirls around, and when done trad, almost every week they had a faint film of dust on them.
done WFP they absolutely never have a film of dust on them.
but I'm equally sure that if they were not done every week, by the end of a month I would see a film of dust on them regardless of whether or not I did them WFP or not.
you use detergent, as squeaks has said, you leave a microscopic film on the glass that will be slightly 'sticky' to small enough particles.
In the olden days you could see this on the inside of pub windows
the smoke would stick to the glass after a few days and you could see every turn of your squeegee
Anyway, I've got £191 of domestics to knock out before 4pm
I'm outa here!
Ian