How efficient is the WFP (Water-Fed Pole) process?

Pure Water has amazing intrinsic cleaning qualities, which is why it is used throughout the cleaning industry, not just in the window-cleaning field. So Pure Water window cleaning is perfect for removing day to day grime that builds up on our homes due to weather and environmental factors etc, keeping our windows and doors in prime condition. However, our cleaning method won’t remove plaster splatters, paint spatters, stickers (or the residue stickers leave behind) or ivy sucker marks from where clinging plants have previously grown for example. You get the idea.