So, I hope I am going to end this thread right here. Otherwise this will become a waste of time.
Go do some reading on the PWRA forum. Here is the link:
You should find the answers to your questions there.
HOWEVER! At the risk of actually continuing this conversation (please don’t), the video that you shared is a horrible example of how to wash houses, professionally. It is the equivalent of someone posting a video on this forum of “how to clean windows with paper towel and windex.” It is sub-par, not industry standard and not profitable. If you don’t believe me, that’s fine, go read and search on PWRA.
I have been trying to think of how to answer this question without being insulting, because the answer is way too simple:
Sometimes you need to scrub stuff. And sometimes that stuff is high.
Please just go search and read on PWRA, all the answers to your questions are there, and it can open up a new avenue of revenue for your business. Good luck.