Was nosing around and found this info from a trad window cleaners web site. I was trad for years and never felt the need to slag of wfp and when I finally changed it was the best thing I have ever done. Like most I use both but mostly wfp. Here is what he wrote on his site. Traditional Window Cleaning: This is the original and best way to clean U.P.V.C frames sill's and windows. Traditional window cleaning gets one “up close” to the windows where small marks, adhesive and bird droppings on glass, frames and sills can be seen and removed. 100% Health and Safety compliant, ladders have never been banned for window cleaning. Although some cleaners/companies want you to believe. Using traditional methods the glass is left dry, with no water marks or spotting after a clean has taken place. Builders muck and paint etc can be removed from glass and U.P.V.C. Your home is your most valuable asset it pays to protect it and keep it's value, and looking it's best. Only micro-fiber cloths come into contact with your expensive U.P.V.C frames, sill's and doors. Offering your home total U.P.V.C protection. Windows, frames and sill's are left dry and are not left covered in water. This stops dust settling and sticking to them, and prevents water from dripping back out of vents with dirt when the cleaner has left. We also clean interior windows. Frames and sill's are cleaned by hand which prevents frames and sill's going off white and grey. Keeping your Frames and sill's looking cleaner and newer for many years. Keeping your most valuable asset looking it's best. Reach Water-Fed Pole System Cleaning: This form of window cleaning that was first used for commercial work to carry out cleaning of office blocks etc. Until window cleaners discovered that they could clean houses in a matter of minutes. Earning up to£100 per an hour. Hard plastic brush heads come into contact with U.P.V.C frames, sills and doors. Only water is used nothing is added to it to give real cleaning power. No ability to scrub frames or remove black marks using U.P.V.C restorer and cleaning fluids. Cleaning is only carried out from ground level. Can not remove builders muck, paint, selotape or black marks from frames, sills or doors. In the winter months water that is left around front doors and paths can turn to ice. Only cotton toweling or micro-fibre cloths come into contact with your expensive U.P.V.C frames, sill's and doors. Offering your home total U.P.V.C protection. Using traditional window cleaning methods only, we can prevent your home from having frames and sill's a doors that look like this. He is nearly right about the £'s per hour....isn't that why we do what we do..