Peoples minds have changed over the last year or so in favour of WFP i would say as more and more WC`s are now using that method of working,as said they wouldn`t still be with you this far down the line but there are still customers out there that like to see you really graft for your money.IMO 2 years down the line traditional window cleaners will be few and far between and i reckon they will reget not changing as customers now have the choice if they get all there windows cleaned or 2/3rds with a traditional cleaner.