Arm & Hammer Biodegradable HVAC and Air Conditioner Coil Cleaner Foam Aerosol Spray, 19 fl. oz, AHCC-19 by Diversitech

Worked great - got soooo much out. It's easy and it's strangely satisfying to spray on and watch it pull stuff out. The window A/C unit runs better and no longer occasionally shoots out little bits of dust and things that got past the filters. I did multiple rounds (plus spray bottle with very warm water between rounds) and there is still some left for a future cleaning. The smell is also nice - a fresh orange scent that isn't overwhelming and isn't 'chemical-y'

Great product, easy to use and clear results. This is my second can to keep my air conditioner clean and will keep buying.

Worked perfectly on ancient indoor A/C units in my rental apartment. I was doubtful at first but the weird smell has been banished!

Sprayed on the air conditioner spray on the coils. I let it sit for 5 minutes. Then hosed it off. It works great.

Also great for cleaning and deodorizing a vehicles AC evaporator. I use this every time before I replace the air filters on my Tesla Model 3. It effectively removes any odors the AC system may be producing and cleans any dirt off the evaporator. This product also foams up a lot which ensures my entire evaporator is coated in the cleaning solution. After about 10-15 minutes the foam dissipates and drains out of the AC drain underneath the car. Although rinsing is not needed, I usually spray water onto the evaporator afterwards to rinse it off. Then I wait overnight and then drop in the new filters. With 19oz vs a 6oz Kool-It bottle, at the same price, this is the evaporator cleaner to buy!

So Good use every year when my window units come up from the basement. So easy to use .

This product works well, as advertised (and it can clean up to two condensers.)

The coil cleaner works as it should and was packaged carefully and delivered fast.