Stay with it shiner.
It's true, everyone who has expressed doubt to me has been male. I had a (male) customer who told me that he was concerned that his thirteen year old mastic around his windows would suffer with me splashing water over it and could I do it the 'old fashioned way.' Who knows the age of their mastic on their property I ask you?
Regarding the beading problem, I can normally still get a good finish on first cleans on new windows if I scrub like a nutter and rinse rinse rinse. However I do take 45 minutes on an average first clean (14 windows). Third week of wfp and it does get better. I could have cried on the first week..honest. I was at one customers house for over two hours after the frames would not stop milking down the panes. I think as long as you show that you want to do a good job then you won't have any problems.
I sent letters to all my customers warning them of the change (I only have a small round). Then on the first clean I would tell customers to let me know if the finish was not good and I would come back and rinse them again. I had two callbacks who both offered to pay me again! Haven't lost a customer yet.
On the plus side I picked up two more customers who saw my highly visible pole and trolley and inquired about it. It was actually three but one was the mother-in-law so that doesn't count. Come to think of it, she still hasn't paid me.