90-299 Coil Safe Professional Grade Neutral pH Evaporator and Condenser Coil Cleaner, 1 quart Bottle, Green

Smells a lot like window cleaner, but I think it worked. We took apart a portable AC we use in our bedroom and the coils were PACKED with dust/dirt that was caked in there. I sprayed it on there, let it sit, and scrubbed the coils with a soft nylon brush. I did this a couple of times until most of the really packed on dirt was gone. Then rinsed ALOT with water, let dry and the AC is working great.The product seemed to stick and a little hard to wash off... not sure if that's good or bad.Tip, the spray nozzle from a spray bottle from the dollar store fit on this bottle.

This certainly cleans but as others have said I will never clean an ac inside again. It took 3 days to air out the room and I’m still a little worried about the fumes.

I wanted a coil cleaner for my condensers outside that I could hook to a garden hose sprayer. I also wanted something that wouldn't foam (or at least minimally did so) since I've gotten canned coil cleaner (which cost more and only does one unit!) and they all foamed up before hitting the coils and I don't feel they got good penetration into the coils and just sat on the surface.It frothed up a little but no more than any light soapy solution. Had a typical all-purpose cleaner scent to it. I used it on two units that had light dirty on them, so I can't say how well it'd do for a more dirty unit, but I did see a bit of mud getting washed out of the coils.Could probably get at 4 or 5 units cleaned with one bottle. Next time I might go and put it in a garden sprayer to get a more even concentration.

Recommended by ChatGPT and does the job of cleaning our condenser coils (along with a gentle rinse using our garden hose) on our heat pump. I’ll be using this about once a month now. Way better than paying overpriced condenser coil cleaning fees.Don’t forget to dilute 5:1.

Worked good