Perfect Filter Repacement Wicks for USB humidifier users when running out of the little original ones, no worry about the service life about the humidifier
To see a better performance,we advise user to soak a filter stick to be wet completely before inserting to the humidifier and turning it on
Usually 1 to 2 weeks, replace the filter, or easy to connect the machine. If you regularly use essential oils, need to replace 3 - 6 days(depending on usage and water quality)
If you have any question ,concern and issue ,please visit our store and contact us by customer service email. Thanks a lot