you dont need a first clean letter,all you have to do is take a bit longer and do a real good clean and make sure they are clean when you leave!

Theres no excuses for windows that arent cleaned or rinsed off!
Do a good job the first clean and then every clean is easier!
Thats right, all this nonsense about giving your customers a letter for initial cleans or about wfp systems is no more necessary than giving the customer a letter about cleaning the windows in the traditional way.
Maybe you should make a poll up to see who gave a 1st letter and who didn't if you think it's nonsense.
Personal choice I believe, I have sent a copy of my letter to other members.
But I didn't actually give customers a letter when I swapped over to wfp, just done it, the problem not giving a letter was, it did take a lot of time explaining things, it might of been easier to give letter.
If I could start again, I think I would give a letter.
Darren