Product review (5 stars): Hard to find item is a necessity not an option
We could not find this item anywhere then i looked on amazon.com and here it was. You have to use antibacterial even when you get a ball with the machine that is said to do the job.

I love this product. I like the larger bottles and it really makes our room clean smelling not musty and molded.  Our maching stays super clean and free of all bacteria and molds using this. I would not be without it.

If you are using a humidifier and they say you do not need to add chemical, wrong. Buy this and you will see the difference and how clean  your machine and air stays.