We use Surfacelogix cleaners products:
Cobble Clean is a concentrated eco-friendly blend of biodegradable solvents and detergents formulated for heavy duty degreasing and dirt removal. Use to remove oil, grease stains, chewing gum, and tire marks.
This organic cleaner will remove oxide formed stains (i.e. rust from sprinklers) from bare and coated concrete surfaces. When used on interlocking pavers, the surface will not be etched thus protecting the paver’s colors.