I can't imagine going through all that effort every time you find some urine.Yes, I buy it to use in the washing machine. It's a laundry detergent with enzymes. If will make suds in the carpet if you use a strong solution. It helps to have a wet & dry vacumn that you use to suck the solution out of the carpet after treatment, otherwise you need to soak up as much as you can with towels. I can't imagine the US doesn't have similar products to the UK.
I have a hard time getting my bed made in the morning before I begin my cat chores - and, they last all day! - so having to follow those directions just makes me tired thinking of it. However, thanks for the info - you never know when it might come in handy - btw - here in the USA, I think Borax might fit the description???