Not nit-picking really.....but you do leave yourself open quite often:

Yes 2 -3 jobs per hour seems quite acceptable, but then you add.
"And they werent little jobs either,all houses spread out between two towns 5 miles apart" :

Yes it is possible to get a good job done most of the time....but 100% perfect...everytime......pull the other one :

You say
"I always without fail check my work and 6 jobs today I collected the money after the water had dried, so i could see the work done. I'm not in the habit of cutting corners, every inch of the window gets scrubbed and rinsed! "
You didn't finish work till 3.30pm then you went collecting and checked every window you cleaned?
Do you get the ladders out for the top windows?
It's getting dark by then so do you take a torch?
I do think you tell the truth Luke, but you do tend to add/omit relevant info that wouldn't have folks questioning you all the while.
Don't take it personal