This may be true for REPUTABLE businesses, but there's a TON of newbies on this site and I think this poll may encourage them to try a brightener or question why we use it.
I'm also guessing that there's a lot newbies on this site or 'interested folk' and this poll can be a learning experience. It's up to a reputable reader/teacher to decide if they want to answer this question, it's not because they assume we know the answer.
Of the 6 pressure washing businesses out here (that I called) only 2 of the 6 knew what I was talking about when I called them and asked about brightener. They may not be reputable, they're most likely towing a Sears Best in the back of their wives car, but who am I to question these 'competitors' ways of washing? [idts]
There's only a few that answered.... but not everyone answered YES.