Here we go, another can of worms opened
Protector is one of those subjects nobody can agree on
Up one end of the scale you've got some guys who price it high and try to sell it on every job, then there's those who don't even themselves believe it works so never sell it.
I think there's a happy medium. It all centres around value for money.
I charge a decent amount for protector but I only recommend it where I think it's going to give the customer value for money.
If you clean a filthy suite in a family home where the kids and dog are going to mess it all up again within a couple of months, protector isn't really worth it. I tell them not to spend on protector and save the money to have it cleaned more often.
If someone moves in to a house and wants the carpets cleaned up to tide them over until they get round to replacing them in the next year or two, no point there either.
Where I recommend it is on carpets & upholstery that are in good condition and the customers seem like they are the type who are quite careful. They're not likely to plaster food & drink everywhere and deal with any spills as they happen. These are they sort of customer who it's easy to sell it to
I don't think there's many amongst us who try to sell protector at a decent price all the time... I believe the sales gurus call this "leaving money on the table" :