These work great to keep water fresh. I live in the desert so use a humidifier year round when I sleep due to dry sinuses. I only clean my humidifier once a month and drop in a new cleaning ball then. But, sometimes I forget and it's still fine weeks later.
Verified purchase: Yes | Condition: New
Works as intended in the humidifier still in use because of the cool weather still occurring in the region.. Have been using this style of cleaner for the last 6 years.
Verified purchase: Yes | Condition: Pre-owned
Verified purchase: Yes | Condition: New
does a good job of keeping water fresh in humidifier
Verified purchase: Yes | Condition: New
quiet and it guzzles water - meaning it is working hard to humidify the house
Verified purchase: Yes | Condition: New
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