I used that new product QUICK on the pool deck in Tacoma. It is a stained concrete that had a huge amount of dirty despite being in the pool area. I mixed up the solution and spread it on with the mop. I let it sit for all of about 2 minutes before I took a deck brush to it. I did a light scrubbing and then rinsed it with a hose. It was amazing the difference. And it was quick (pun intended). Thanks for making this recommendation. We are adding this product to our regular cleaning schedule.