I have no doubt that wfp is quicker than trad generally, so you should be able to make more money or do your week quicker. But there are windows and there are windows and there are windows. Loads of them, lots of different types, shapes, positions, frames, paint, bad seals etc etc. I did a house today for the 4th or 5th time today wfp. All perfect except one. Same as every time. Don't know why, but it will be quicker for me to trad it. I have been using wfp for a year now and am still learning how best to clean the houses I know. Some are all wfp, a few all trad, some wfp up and trad down. Some like the one mentioned - got a "rogue" window. My advice would be remember you are a window cleaner, not a wfp w/c or a trad w/c. Get the windows clean the best way you can.
