Depends on access to windows, squeegee on normal windows which is the best.
I have just done a difficult office clean last week where there was 130 internal windows and 20 glass walls where important computers and paper work are under all the windows in this case i used a vikan indoor kit which proved invalueable and saved me at least 2 hours.
Stan, how are you after the operation? hope you r well and back at work soon m8