Not pointless if you advertise you clean all the frame every visit! Do you advertise that Paul?
Sorry but you will not leave perfect results with your level of rinsing. Acceptable maybe, but not perfect. If you had some real competition I think you would need to raise your game. My opinion.
Glad you can work so fast.
I do advertise I clean the frames every time and i do
but again clean is clean if there's no dirt there's no dirt if i approach a house and the top is dirty
I clean it, as for competition there's plenty but my perfect results keep me ahead.
To be honest its not the first time we've had a complaint and I have went
round and the cust'y has said i'm not happy with the clean I ask why,
can you show me the issue and after checking every window and frame
and not finding anything they tell me we are to quick

which I reply in the nicest way possible if at any point your windows
are not clean we will redo them with in 24 hrs and say good bye.