Apparntly "its aerosoled water and doesnt clean them but actually damages them and makes them look worse"
"He does a better job with his son the old way and cheaper" 
Hope i quoted right!
For one i love trad, for two im upstairs wfp, :
to make my life easier
to clean quicker
to earn more money
to provide a better service to my customers
to clean frames, sills etc every clean
plus many other positives
This guy with his son must be an idiot if as in the quote he calls wfp aerosoled water, MAYBE HE SHOULD GET HIS FACTS RIGHT B4 HE SLAGS OFF OTHER PEOPLES WORKING PRACTISE!!
It reminds me of a story my father in law told me when he first taught me in the painting and decorating trade, several years ago...... Many old painters SLAGGED OFF PAINT ROLLERS,(those who said it would never catch on, and preferred paint brushes!!!!! HOW SILLY!!!!! - now an age old revolution in painting decorating!!!!
Its true with this he needs to get his facts right!
POACHING, well I could tell you another story!!!
Its wrong especially when you slate another professionals work, WHICH WE ALL ARE ON HERE! ( I HOPE)
Anyway respect to you all but ive never used underhanded tactics, i think if i did it would show true un=professionalism, and cover up the fact that i really would be either scratching round for whatever work i could get. ............
TRUST ME that isnt the case
As i said propole replace them with better work !