Had a call from a very nice lady asking if id quote them for window cleaning at there new offices, of course I said yes and went tae have a look see, I assumed it was just normal outside cleans , when I got there she showed me round then asked if id quote for cleaning inside panes as well, I told her id never done that before but she didn't seemed bothered by this , anyway too cut a long story short I had a look inside and I am guestimatting that the inside office windows will take a mornings work, there are not many windows outside as its a converted warehouse, but a good few internal panes between offices, I gave my price and got the contract yesterday, anyway as ive never cleaned inside panes I need too get some advise on what the best equipment for the job is. What do you guys recommend for inside cleans? I want decent quality kit that does a good job, a list off the basics be great. I can get at most internal windows as they are normal height but at the stairway I need a extension pole, should I use my wfp with an inside cleaning attachment? does such a device exist, does anybody use that Karcher device? is it any good? Some pictures The first 3 are external windows, the last ones the stairway with coloured glass, the rest inside ones are normal clear panes between offices and obviously the inside panes off the external windows, its a 4 weekly contract , thanks in advance guys and gals, total newbie too inside cleans but wanna do a good job from day one .