Three is not the magic number
When I first started Reach and wash I used to think After three cleans it will be perfect...
You are right about a lot of water on a first clean.But this is what I do
First do all the frams Tops and down, Then just rub the glass...... Leave it for as long as possible if you can go and do another house, Then go back and do just the windows,,This way will prevent a lot of spotting...
I say to all my customers it will take three cleans..
On the first clean dont worry about spots (you will get them)
On the second I say to the customer that I will go back and check..... Now on the second clean they should come up good, If not then I have found that they will always spot a little
The third clean you should know what windows that do this.. So clean accordingly If the bottoms spot blade off and if the tops spot Then use ladders on this one or try to find out whats causing the spots and dont put the brush near the top frame (thats what causes a lot of spots to run out )...