If Ive lost half a dozen jobs due to wfp over 4 years then I'd be amazed.
If Ive GAINED two dozen jobs from trad cleaners then I'd probably way short of the actual number gained.
For the record again I clean both trad and wfp. But wfp is my 1st choice on upstairs work.
One old lass said to me once. " Dont think much to that machine"
I said " Why? Is it leaving spots or runs etc"
She said " No it cleans them fine...I just dont like it"
She was however happy for me to continue.
People are strange sometimes. They dont like change. They feel that they are short changed if you use wfp.
Most wake up and smell the coffee sooner or later.
Its best not to think too deeply about customers and their opinions. You can get yourself all paranoid worrying about things like that. Its a percentages game and you have got to accept some losses. Would Alan Sugar be bothered?
Everybody agrees that McDonalds food is rubbish yet people queue up to buy it. WFP is exactly the same IMO. Not great but good enough and its more profitable than trad.
If enough customers pay you to clean their windows WFP then its fine. If some don't like it thats fine too. I am in business to make money, my books are full, my phone never stops ringing.