Nu-Calgon 4168-08 Evap Pow'r No Rinse Coil Cleaner (2 Pack)

Nucalgon coil cleaner works great

You need a pump can do uses it works so well with the pump can. It’s 1 to 3 ratio‘s so one cup of soap To 3 cups of water. Repeat the process to you get whatever you need. spray from the top Really heavy and work your way down. Let stand for 15 minutes now with a regular garden hose with a sprayer start spraying from the top down to get clean water! That’s it you’ve got to see so much dirt and grime and stuff just so used for my AC unit on the side of my house