Hi,cleaned a large commercial today,carpet tiles.They where pretty worn and thrashed.So had to rotary scrub and extract.The floor was completely empty.So when you looked down the floor you seen the darker worn areas,Used oxibrite in my rotary to brighten it up and green stripe bonnet.Been using the same technique for years as it worked.But hearing guys talking about Dynamall etc,wondering this old geezer is not keeping up with the latest carpet cleaning solution.What do you guys use on tiles that need to be scrubbed and extracted?