Nu-Brite is the most effective coil cleaner available today. It foams, brightens, and cleans more effectively than acids, particularly in removing grease. Biodegradable. The liquid versions are USDA approved and NSF registered.
Tri-Pow'r HD is an outstanding general purpose coil cleaner, providing detergency and degreasing as well as deodorizing capability. Its positive emulsion technology is very effective against oily grime as it converts the deposits into a more liquid form that can be easily rinsed. It is non-acid, non-toxic, and biodegradable. NSF registered. Also great for microchannel coils.