Air-O-Swiss AOS 7417 EZ Cal - Cleaner/Descaler - 3 pack

Easy to use, melts off the calcium deposits if you follow the directions, but don't wait too long between cleanings or you'll have to use multiple applications.

I had tried several other descaler products and found them to work only superficially. It always required a long soak and then it was never really clean. The light indicating the unit needed to be cleaned would back on in no time. This stuff cleaned it perfectly with one application. I'm just going to keep a supply of these on hand now.

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This cleaner did exactly what was expected. I had some green mold like substance in my humidifier (Air-O-Swiss). After using this product, the mold was gone and so was a moldy odor that was coming from the device.

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I've tried cleaning my humidifier with vinegar, soap, etc. Nothing has gotten rid of the musty smell coming from my humidifier like this packet. You add this to about a liter of hot water, pour it into the base of your humidifier (I have an Air-o-swiss), let sit for 30 mins and pour out. When I turn on my humidifier, the air smells fresh and clean.

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This is as simple as a product gets....it helps keep your expensive Air-O-Swiss investment running in tip top shape. We have multiple humidifiers around our home by Air-O-Swiss and we have well water where we live. Naturally the units can get mucked up pretty quickly...but using a pack of this stuff once every 2-3 months keeps them running perfectly fine...

Highly recommended.