After using the Coil Cleaner for my AC unit, I can confidently say it's a game-changer for maintaining both residential and commercial systems. The non-foam formula cuts through grime like a hot knife through butter, leaving coils looking brand new.

The application process was straightforward, though messy - but that's more about the amount of dirt than the product itself. I used a battery-powered sprayer which worked perfectly with this cleaner. The satisfaction of watching years of built-up gunk wash away was worth the effort.

What really impressed me was how it handled 15 years worth of accumulated dirt and fiberglass in my attic unit. The coils came out so clean they practically sparkled! While cleaning in a hot attic isn't fun, this product made the job possible without removing the entire unit.

A few tips from my experience: Have a wet/dry vac ready for cleanup, and be prepared for some seriously dirty runoff water. Also, while it's not what professionals use (as one reviewer noted), it absolutely gets professional-level results for DIYers.

The only downside? You'll realize just how dirty your coils were before cleaning - but that's actually a good thing! For anyone maintaining their own AC system, this cleaner is absolutely worth having on hand.