Product review (2 stars): These wicks are cheaper but don't last as long
I bought a six-pack of these wicks because, even though we have a water softener, we always seem to get a mineral build up on the wicks, and since we go through several each season, I thought these would be more economical.  Unfortunately, they don't last as long as the other more expensive brand.  We are only getting about one week out of each of these before the top part gets a build up, and then dries out so the humidifier doesn't function well.  I followed other reviewers' suggestions and soaked the wick in a vinegar water solution, but that only extended the life another few days. With the other brand, I usually got at least three weeks out of each wick.  Disappointed.  I would love it if someone would invent a wick made from cotton that you could toss in the washer.